PPC/FAQ

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The Gentoo/PPC FAQ is a collection of questions and answers collected from the Gentoo/PPC mailing lists and from IRC.

Contents

Introduction to the Gentoo/PPC FAQ

This FAQ is a collection of questions and answers collected from the Gentoo/PPC mailing lists and from IRC. If you have any questions (or answers!), please contact either an author or a member of the documentation team.

Installation

What kind of PowerPC computer do I have and where can I find more information about it?

Welcome to Gentoo PPC! The PowerPC processor has been used in a number of popular computing devices, here are some links to help you figure out what type of hardware is in the machine on your desk.

How can I verify with OSX that the downloaded ISO is not corrupted?

First be sure you did not mount the ftp server with Finder and then copy the file with drag'n'drop. This will corrupt the ISO. Instead, use curl (with curl -O http://path/to/iso).

You can check your MD5 sum using the md5sum tool provided with OSX. On versions of OSX without md5sum, you can use openssl capability to produce an md5 checksum.

user $ openssl md5 /path/to/iso

Now compare this output with the appropriate file found on the server where you downloaded the ISO (the file will end with .md5 ). If it is the same, the ISO image downloaded correctly. Be sure you have not mounted it (e.g. with Disk Copy) yet!

Can I dual-boot Gentoo Linux and Mac OS X?

Yes you can! In fact, yabootconfig will automatically detect and setup /etc/yaboot.conf with Linux, Mac OS X and even classic Mac OS (see the Gentoo Handbook for details on yabootconfig). The trick is in how you partition your hard drive. Before installing Gentoo, startup with the Mac OS X Install CD. Use the Disk Utility to partition the drive in your machine into two or three partitions. Alternatively, use parted from a recent Gentoo InstallCD, since that has been patched to handle HFS and HFS+ partitions. Parted is also able to shrink a partition so you don't need to delete your existing install. The first partition should be big enough to contain all your Linux partitions (root+swap+/home etc.). The format of this partition does not matter. The second partition should be for OS X. The third (and optional) partition should be for classic Mac OS. It is only required if you intend of being able to triple boot, since OS9 must be on a separate partition from OSX for this to work.

After partitioning, install Mac OS X and Mac OS 9 onto their respective partitions. Once installation is complete, start following the Gentoo Handbook . When you get to the section on partitioning, use mac-fdisk to delete the large partition you created for Gentoo. In its place, create a bootstrap partition, root, swap, and any other partitions you wish to use with Gentoo.

If you have an OldWorld Macintosh (pre-iMac), follow a similar procedure as described above. However, use the Mac OS 9 install CD and the Drive Setup utility. OldWorld machines do not need a bootstrap partition.

Note
If yabootconfig does not detect your MacOS partitions, you can manually add them to your yaboot.config. See the example yaboot.conf in the handbook for details.

I have an early NewWorld Mac such as the Blue and White G3. It should be compatible with the InstallCD, but on boot it returns an "Unknown or corrupt filesystem" error.

As a workaround, boot into Open Firmware by holding down the Apple + Option + O + F keys on startup. When the prompt appears, type:

boot cd:,\\yaboot

The CD should boot as expected now, thanks to John Plesmid for this workaround.

I have an OldWorld Macintosh and need to use BootX. However, I am having trouble opening the BootX installer archive. What can I do?

You will need a new version of StuffIt Expander to open the archive. You can download it for free.

I have a Beige G3 machine. Can I install Gentoo Linux/PPC on a second IDE hard drive?

Early Beige G3 machines (those with a "Rev 1" motherboard with an ATI RageII+ chip) do not support slave IDE drives. To use a second hard drive with this machine, you would have to attach it to the internal or external SCSI connector or install a PCI IDE card. Later G3 machines do not have this limitation. See http://www.xlr8yourmac.com/G3-ZONE/IDE/index.html for more information.

I have a revision A or B iMac. I've replaced the hard drive with a larger one and now I can't boot into anything!

There is an 8GB limit for the root partition on these machines. Ensure that your root partition is less than 8GB and it should work as expected. This also applies to OS X and later versions of OS 9.

My /etc/fstab file has /dev/BOOT in it. Do I need to setup this line for my Apple bootstrap partition?

Maybe. If you are not using a separate boot partition ( /boot ) then you do not need this line and can safely just delete it from /etc/fstab . The Apple bootstrap partition is not /boot and is not related in any way.

If you are using a partition type that's not natively supported by the bootloader (such as ext4 and yaboot), you will need to use a separate boot partition. In this case, you will want to specify /dev/BOOT in your fstab.

When I rebooted, yaboot didn't work! Now, I'm stuck. How can I fix this?

It's probably just a misconfigured yaboot.conf. The easiest way to fix this is to boot the InstallCD again, mount your gentoo partition and check yaboot.conf for errors. You'll also need to run ybin -v -C /mnt/gentoo/etc/yaboot.conf to update the boot loader once you have finished. This can all be done without chrooting back into your install.

Note
If you really just need to get back to OSX, try holding down the Option key on startup. This should give you a graphical selection of bootable disks. Choose OSX and remember to fix your boot problems later.

When I try to boot, yaboot only says "read error"! Why can't I boot?

You're probably using XFS for your root partition. While this is an option, yaboot has some issues accessing files with holes. To ensure that your kernel will boot, instead of copying the vmlinux file to /boot, simply cat the kernel as shown below.

root # cat /usr/src/linux/vmlinux > /boot/vmlinux

I installed an OSX update and now my computer only boots into OSX! How can I fix it?

Hold down the option key on boot. This will bring you to a graphical boot device selector. Wait until a hard drive with a penguin shows up and click on the icon. This will boot your linux install as usual. Once you've booted, rerun ybin -v to fix the bootloader.

I want to set the hardware clock from Open Firmware, is that possible?

To set the clock boot into Open Firmware (using the key combination of Apple + O + F). Once you are at the Open Firmware prompt, you can set the clock using the command below:

CodeSetting the clock at the open firmware prompt

# decimal dev rtc sec min hour day month year set-time
# The example below sets the clock to 1:23:45 June, 7th, 2000
 ok
0 > decimal dev rtc 45 23 1 6 7 2000 set-time
 ok
1 >

Open Firmware will return with an ok after the clock is set. Type mac-boot to continue booting after the clock is set.

I have a NuBus (pre-PCI) Power Macintosh or Powerbook. Can I run Gentoo on it?

Official Linux support for NuBus PPC Macintoshs has been dropped starting with Kernel 2.6, so an Installation of Gentoo Linux is actually not possible. You might try the kernel sources provided by the PPC/Linux for NuBus Power Macs Project and combine them with the official Gentoo PPC32 stage archive. Share your experiences with the Gentoo community.

I have an even older Powerbook or a Macintosh Quadra/Macintosh II/Performa/LC equipped with a Motorola (m68k) CPU. What about that?

This FAQ is actually about Gentoo on PPC computers. But before a proper guide about Gentoo on m68k will be written, have a look at the Linux/mac68k Project, the The Linux/m68k Home Pages (somewhat dated), and the information given for Gentoo on the ARAnyM m68k hardware emulator and compare them to the official Gentoo Linux PPC Handbook to figure out how an installation of Gentoo Linux on m68k machines could be done.

Hardware Support

I'm running Gentoo on a PowerPC laptop. What packages should I install to enable laptop-specific functionality?

There are four main packages you will need to install.

  • pbbuttonsd is a tool that enables the brightness and volume keys on most ppc laptops as well as other apple laptop specific functionality. The current versions also work as a power manager and replaces pmud .
  • powerprefs provides a graphical configuration editing tool for configuring pbbuttonsd including settings such as power-management, trackpad options and various other preferences.
  • powernowd allows cpu speed scaling for longer battery life. Other packages also provide the same functionality, such as cpudyn , cpufreqd and speedfreq . It doesn't really matter which you chose, just ensure that you have the userspace cpu frequency scaling governor enabled in your kernel. This is the only governor that will work on PPC.

These packages can be installed by running the appropriate commands from the list below:

root # emerge pbbuttonsd
root #
emerge powerprefs
root #
emerge powernowd
Note
You should edit /etc/pbbuttonsd.conf or use powerprefs to better suit your needs. The behaviour of the Fx-keys can be controlled here as well as many sleep options. To switch the Fx-keys to the OSX behaviour, set KBDMode to fkeyslast. You can turn off touchpad tapping by setting TPMode to notap. Many other options are available, see man pbbuttonsd.conf for details.

It is useful to add pbbuttonsd and powernowd to your boot runlevel so that they're started when your computer starts. To do this:

root # rc-update add pbbuttonsd boot
root #
rc-update add powernowd boot

I only have one mouse-button. How can I make use of the second and third one, since ctrl-button does not work?

There is no way to use ctrl-button like on Mac OS X, but you can map just about any key or combination of keys to emulate the second and third mouse-button. The values can be obtained with the command line utility showkey from the console. Note that this program does not work as expected from X and should only be run from the console. To use this feature, enable the following options in your kernel:

Kernel configurationMacintosh Device Drivers

[*] Apple Desktop Bus (ADB) support
[*]    Use input layer for ADB devices
[*]      Support for mouse button 2+3 emulation

You will also need to set the keyboard to mouse button mapping values in /etc/sysctl.conf . Here is an example using F11 and F12:

File/etc/sysctl.confMouse button emulation with F11 and F12

# Enable mouse button emulation
dev.mac_hid.mouse_button_emulation = 1
# Set 2nd button to 87 - F11
dev.mac_hid.mouse_button2_keycode = 87
# Set 3rd button to 88 - F12
dev.mac_hid.mouse_button3_keycode = 88
Note
Other commonly used keycodes are 125 (The Apple key) and 96 (The Keypad Enter).

To activate these settings:

root # sysctl -p /etc/sysctl.conf

Apple Powerbooks and iBooks that use the Appletouch driver, can alternatively configure multi-finger tapping to allow 2nd and 3rd button control. See the documentation for this driver for configuration options.

How can I configure my Airport card?

The Airport card is an 802.11b device based on the Lucent Orinoco chipset. To use this card in Linux, enable these kernel options:

Kernel configurationWireless LAN

[*] Wirless LAN Drivers & Wireless Extensions
<*> Hermes chipset 802.11b support (Orinoco/Prism2/Symbol)
<*>   Apple Airport support (build-in)

Once the kernel is configured, you'll also need some userland tools to configure the wireless settings. Emerge the wireless-tools for iwconfig and other wireless tools.

As an example of using iwconfig, to set your ESSID to home_essid:

root # iwconfig eth1 essid home_essid

For a generic guide to setting up wireless with Gentoo, please see the Gentoo Wireless Guide .

How can I configure my Airport Extreme card?

The Airport Extreme is an 802.11b/g card that is included with modern Apple portable computers. It is based on the Broadcom 43xx chipset which is supported by the native b43 driver project. It has been included in the 2.6.24 kernel. Note that the driver should select the proper driver between b43 and b43-legacy. The firmware used for these two drivers is different, with the legacy version supporting older 4306 cards. If you have a 4306 card, build both, otherwise, it should be safe to only build b43. To enable either driver, mac80211 must be selected first.

Kernel configurationAdding b43 support to the kernel

Networking --> Wireless -->
     <M>   Generic IEEE 802.11 Networking Stack (mac80211)
  
Device Drivers --> Network device support -->
     [*] Wireless LAN (IEEE 802.11)
     <M>   Broadcom 43xx wireless support (mac80211 stack)
     [*]     Broadcom 43xx debugging
     <M>   Broadcom 43xx-legacy wireless support (mac80211 stack)
     [*]     Broadcom 43xx-legacy debugging

After compiling your kernel, you'll need to emerge b43-fwcutter to install the firmware and get a copy of the firmware. The instructions for this are found at: linuxwireless.org , and follow the directions for extracting the firmware.

For a generic guide to setting up wireless with Gentoo, please see the Gentoo Wireless Guide .

Will the internal modem work?

On older Macs, the internal modem is a regular serial device. In addition to ppp support and i2c support, enable this kernel option to use it:

Kernel configurationSerial Drivers

<*> PowerMac z85c30 ESCC support (CONFIG_SERIAL_PMACZILOG)

Newer Macs use a USB device which only has a driver from Linuxant. Unless you have purchased a key from Linuxant, this driver will only work at 14.4 and will not support FAX. To install the driver, emerge net-dialin/hcfusbmodem which will provide /dev/ttySHCF0 . Then set up ppp like usual. Further information about the installation can be found at http://www.linuxant.com/drivers/hcf/install.html

Does sleep work on my iBook/PowerBook?

Sleep used to work well with the User Mode Setting kernel drivers, but modern X servers using KMS do not sleep properly at this time.

How do I get sound playback working?

There are two approaches to sound on modern kernels: OSS or ALSA. OSS is the older of the two options and has been deprecated, but still functions well for many older Macs. ALSA is the newer method and will continue to be supported in the future. We recommend that you use ALSA unless you have problems with it.

Note
If you include the OSS driver in your kernel, the ALSA driver will not load.

In addition to configuring the kernel, users who should have access to the audio devices need to be added to the appropriate group with the command:

root # gpasswd -a username audio

If the kernel is set up correctly, but you can't hear any sound, ensure that the main mixer volume is turned up and that the device isn't muted!

Note
The sound card on Macs is connected through the i2c Keywest/PowerMac bus, not the PCI bus. You will not see the card listed when viewing the PCI bus or when using alsaconf. This is less of a problem then you might imagine, because all Macs use the same driver for sound, but you will need to insure that you have i2c Keywest/PowerMac support in your kernel.
Important
If you compile in ALSA support, you need to also compile in i2c Keywest/PowerMac support. Failure to do this will result in kernel panics on boot!

Sound setup with ALSA

For ALSA, we'll set up both the regular ALSA drivers and the OSS emulation layer so that we can still use legacy OSS only programs. In make menuconfig you'll need to select:

Kernel configurationKernel options for ALSA

Device Drivers - I2c support --->
  I2C Hardware Bus Support --->
    <*> Powermac I2C interface (Keywest on 2.6.15 and older)
  
Device Drivers - Sound --->
<*> Sound card support
    Advanced Linux Sound Architecture --->
    < >   PowerMac DMA sound support
      <*> Advanced Linux Sound Architecture
      <*> Sequencer support
      <*> Sequencer dummy client
      <*> OSS Mixer API
      <*> OSS PCM (digital audio) API
      [*] OSS Sequencer API

Depending on the age of the machine, the correct sound driver should also be enabled. On more modern machines such as Aluminum PowerBooks, new iBooks or G5's the Apple On-board Audio driver should be used. For older machines, try the ALSA PowerMac driver instead.

Kernel configurationALSA Drivers - Choose only one

Older Machines
    ALSA PowerMac devices --->
        <*> PowerMac (AWACS, DACA, Burgundy, Tumbler, Keywest)
Newer Machines
    Apple Onboard Audio driver --->
        <*> Apple Onboard Audio driver
        <*>   layout-id fabric
        <*>   support Onyx chip
        <*>   support TAS chip
        <*>   support Toonie chip

You can also configure these as modules and ensure they're loaded on boot, but it's easier to simply compile it all in.

Note
Please make sure that PowerMac DMA sound support is turned off, otherwise the ALSA module will not be able to load.

For more information on configuring ALSA, please see the ALSA article on the Gentoo Wiki.

Note
If you are using the alsa-driver package instead of building it into your kernel, the ALSA_CARDS variable should be set to powermac for older Macs or all of aoa , aoa-fabric-layout , aoa-soundbus , aoa-soundbus-i2c , aoa-onyx , aoa-tas and aoa-toonie for newer Macs.

Sound setup with OSS

Note
Again, only use this if you're not using ALSA.

In make menuconfig you'll need to select:

Kernel configurationKernel options for OSS

Device Drivers - I2c support --->
  I2C Hardware Bus Support --->
    <*> Powermac I2C interface (Keywest on 2.6.15 and older)
  
Device Drivers - Sound --->
<*> Sound card support
  <*>   PowerMac DMA sound support

Or configure as modules and ensure they're loaded on boot.

If the dmasound_pmac module does not load, you probably need to enable i2c-core in the kernel or as a module.

Note
If you are still using OSS sound, please test the ALSA drivers instead and report any regressions to the ALSA bugzila. Thanks!

How do I make my Mac power up after a power failure?

The Power Management Unit (PMU) in most Macs has the ability to turn the Mac on again after a power loss. This feature is controlled by the PMU options found in /proc . To enable this feature, set server_mode to 1, to disable it, set server_mode to 0.

root # echo "server_mode=1" > /proc/pmu/options

Unfortunately, this setting is turned off again after the machine restarts. To ensure that your system always starts with power on after power failure enabled, add the line above to /etc/conf.d/local.start .

I see lots of "IN from bad port" errors in my kernel dmesg, how do I fix that?

This is caused by drivers written for devices that you don't have on your system. These messages are usually harmless, but it's a good idea to disable the unused drivers anyway. See below to match up port numbers with kernel configuration options. Note that even if the numbers don't match, try disabling these kernel options anyway, most PPC machines don't use these drivers.

Kernel configurationIN from bad port 61 - Disable PC Speaker support

Device Drivers - Input device support --->
[*] Miscellanous devices --->
      < > PC Speaker Support
Kernel configurationIN from bad port 64 - Disable i8042 keyboard support

Device Drivers - Input device support --->
Hardware I/O Ports --->
      < > Serial I/O support
        < > i8042 PC Keyboard controller
Kernel configurationIN from bad port 2E9,2F9,3E9,3F9 - Disable 8250/16550 support

Device Drivers - Character devices --->
Serial drivers --->
      < > 8250/16550 and compatible serial support

If you have another IN from bad port message that you're not sure about, please let us know!

Applications

I can't emerge a package, and get an error about it being masked. What should I do?

There are two common reasons why a package will not emerge: either it hasn't been tested on PPC or it has been tested, but hasn't yet been marked stable.

CodeThe Package Hasn't Been Tested on PPC

!!! All ebuilds that could satisfy "bar" have been masked.
!!! One of the following masked packages is required to complete your request:
- app-foo/bar-1.0 (masked by: missing keyword)

If your package hasn't yet been tested on PPC, you'll need to first mark the ebuild with the ppc keyword. This is done using the ekeyword tool which is part of the gentoolkit-dev package. To mark the ebuild ppc and regenerate the manifest file so that it reflects the changes:

root # ekeyword ppc /usr/portage/app-foo/bar/bar-1.0.ebuild
root #
ebuild /usr/portage/app-foo/bar/bar-1.0.ebuild manifest

Once the ebuild has been keyworded, you can now emerge it as usual. Test the application and if it works, please report it as a bug so one of the developers can add the keyword.

Note
This change will only last until the next sync. If you need a more permanent fix, you can maintain a portage overlay. See the portage documentation for more information on maintaining an overlay.
CodeThe Package Hasn't Been Marked Stable on PPC

!!! All ebuilds that could satisfy "bar" have been masked.
!!! One of the following masked packages is required to complete your request:
- app-foo/bar-1.0 (masked by: ~ppc keyword)

If your package already has the ~ppc keyword, you have two options. Either follow the above instructions and replace the ~ppc keyword with ppc, or you can use /etc/portage to unmask the specific package. The second option is preferred simply because it won't be undone by an emerge sync.

root # echo "=app-foo/bar-1.0" > /etc/portage/package.accept_keywords
Note
If the /etc/portage directory does not exist, make sure to create it first.

Now emerge the package as normal. Once you're sure the app is stable, please report this as a bug so the developers can add the keyword.

Does Gentoo/PPC have support for Flash?

Well, not really. Macromedia has not supplied a linux/ppc binary and open source implementations are incomplete at this time. However, there are two projects that can play many flash objects, gnash and swfdec . Both are capable of playing back Youtube movies and lots of other popular content.

Does Gentoo/PPC have a Java plugin?

Yes, a Java plugin is now available with IBM's Java 1.5 and 1.6. Note that not all Java applications work with these Java versions yet.

What is required for DRM?

When emerging xorg-server, make sure the dri use flag is enabled. You should also set the VIDEO_CARDS variable in make.conf with your video card, VIDEO_CARDS="radeon" for radeon support, VIDEO_CARDS="nouveau" for nvidia support and so on. For a backup option, add fbdev to the list of VIDEO_CARDS, this driver should always work.

Make sure in your kernel config you have the following options set:

Kernel configurationRage128 DRM kernel configuration

Device Drivers - Graphics Support --->
  <*> /dev/agpgart (AGP Support)
    [*] Apple UniNorth support
  [*] Direct Rendering Manager (DRI support)
    <*>   ATI Rage 128
  -*- Support for frame buffer devices
    <*>   ATI Rage 128 display support
Kernel configurationRadeon DRM kernel configuration

Device Drivers - Graphics Support --->
  <*> /dev/agpgart (AGP Support)
    [*] Apple UniNorth support
  [*] Direct Rendering Manager (DRI support)
    <*>   ATI Radeon
    [*]   Enable modesetting on radeon by default - NEW DRIVER
Kernel configurationnVidia kernel configuration

Device Drivers - Graphics Support --->
  <*> /dev/agpgart (AGP Support)
    [*] Apple UniNorth support
  [*] Direct Rendering Manager (DRI support)
    <*> Nouveau (nVidia) cards
    [*]   Support for backlight control
Note
For nVidia and Radeon devices using KMS, be sure to disable the built in frame buffer devices, these prevent the KMS drivers from starting.
Important
You may need to edit your /etc/X11/xorg.conf file depending on your card setup. Ensure that the device driver selected is the specific driver for your device, (such as radeon or nouveau). Also check that the DRI extension is loaded and not commented out.

I've installed X.org and configured it correctly, but the radeon or nouveau driver is missing. What's wrong?

Add the appropriate VIDEO_CARDS line to /etc/portage/make.conf and recompile xorg-server and mesa to build the drivers.

I have a VBIOS or "Invalid I/O allocation" error in my xorg.log. Is this a problem?

No, this is simply X.org probing your video card. It attempts to open the x86 only video BIOS and fails, leaving one of these messages. It's harmless, don't worry about it!

When using OpenGL DRI or playing movies, the system sometimes freezes hard unexpectedly. What can I do?

Your system may not cope properly with AGP support. The easiest solution is to add the following line to the "Device" section of /etc/X11/xorg.conf :

File/etc/X11/xorg.confForcing PCI mode for AGP-Cards

Option       "ForcePCIMode"

If you are still having trouble, please try disabling dri in your xorg.conf to see if the problems go away.

I recently emerged Xorg, but when using it, my international keyboard layout does not work correctly. The main keys work fine but I am unable to compose special characters like the "at" sign. The startx output says something like "could not load keymap, falling back to default keymap". What is wrong?

Check that the permissions on /var/tmp are set to drwxrwxrwx . If not, change them by typing chmod a+rwx /var/tmp . This will allow Xorg to load keymaps properly again.

How do I play Audio CDs?

NewWorld machines have no audio connection between their CD-ROM drive and their sound hardware. Therefore, audio information must be read as data and then piped to the sound hardware. This is possible using Audacious , which reads the audio off the CD over the ATA cable, decodes it in software and sends it to the sound card over the PCI bus as digital data.

root # emerge audacious

To play a CD, just fire up audacious . If you're having playback trouble, you may need to open up the Preferences-->Plugins-->CD Audio Plugin menu and select your CD drive. Make sure that "Digital audio extraction" is checked.

Can I access my ext2/ext3 partitions from OSX?

OSX can support the reading and writing of ext2/ext3 partitions by using the kernel extension provided by the ext2fsx project.

Note
When using MOL, you cannot access a partition that is currently being used by Linux.

Which Portage USE flags do not work on PowerPC machines?

If you're using an old flat profile, (deprecated, pre 2005.0) look at /etc/portage/make.profile/use.mask for a list.

If you're using a cascaded profile, (2005.0 and onwards) look at /usr/portage/profiles/default-linux/ppc/use.mask for a list.

How can I set up distcc with my x86 box?

If you've got another faster computer, you can set up distcc to compile binaries for your slower ppc processor. It's better to do as much building as possible on the faster machine; if possible, don't even build on the slower computer. Read the DistCC Cross-compiling Guide to learn how. You may also want to read the Gentoo Embedded Handbook to learn more about cross-compiling.

Resources

Can I buy a CD of Gentoo Linux/PPC?

Yes! We sell Gentoo on CD-ROM in our Gentoo store .

This FAQ hasn't answered my question. What do I do now?

A good first step is to browse through the relevant documentation on www.gentoo.org . Two PPC-specific mailing lists currently exist, gentoo-ppc-dev and gentoo-ppc-user. Gentoo on PPC (on forums.gentoo.org) is an open bulletin-board for discussion of all PowerPC issues. Also, there is usually a lively discussion on IRC. Join us on #gentoo-ppc on irc.freenode.net .

General information about Linux on PowerPC can be found at penguinppc.org . General Linux information is at www.linuxdoc.org .

Acknowledgements

We would like to thank the following authors and editors for their contributions to this guide:


  • Rajiv Manglani
  • Lars Weiler
  • Jochen Maes
  • Joseph Jezak
  • nightmorph