Difference between revisions of "Intel GMA 500"

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[[Category:X Server]]
{{Article summary start}}
{{Article summary text|The current state of Intel GMA500/Poulsbo hardware support under Arch Linux.}}
{{Article summary heading|Related}}
{{Article summary wiki|Intel Graphics}}
{{Article summary wiki|Xorg}}
{{Article summary wiki|MPlayer}}
{{Article summary heading|Resources}}
{{Article summary link|Poulsbo Discussion in Arch BBS|https://bbs.archlinux.org/viewtopic.php?pid=746439}}
{{Article summary end}}
The '''Intel GMA 500''' series, also known by it's codename '''Poulsbo''' or '''[http://ark.intel.com/Product.aspx?id=35444 Intel System Controller Hub US15W]''', is a family of integrated video adapters based on the PowerVR SGX 535 graphics core. It is typically found on boards for the Atom Z processor series. Features include hardware decoding capability of up to 720p/1080i video content in various state-of-the-art codecs, e.g. H.264.
As the PowerVR SGX 535 graphics core was developed by Imagination Technologies and then licensed by Intel, the standard opensource [[Intel]] drivers do not work with this hardware.
On this page you find comprehensive information about how to get the best out of your Poulsbo hardware using Arch Linux.
== Kernel's gma500_gfx module ==
With kernel 2.6.39, a new psb_gfx module appeared in the kernel developed by [http://en.wikipedia.org/wiki/Alan_Cox Alan Cox] to support Poulsbo hardware. As of kernel 3.3.rc1 the driver has left staging and been renamed gma500_gfx. ([http://blog.bodhizazen.net/linux/linux-gma500-poulsbo-driver-moved-out-of-staging/])
* Native resolution (1366x768) with early KMS (tested on Asus Eee 1101HA)
* Up to date kernel and Xorg
* 2D acceleration
* Works out of the box
* Some are unable to get native resolution (e.g 1366x768)
* No 3D acceleration possible
* Poor multimedia performance (use mplayer with x11 or sdl so fullscreen video will be quite slow)
To check if the driver is loaded, the output of <code>lsmod | grep gma</code> should look like this:
gma500_gfx            131893  2
i2c_algo_bit            4615  1 gma500_gfx
drm_kms_helper        29203  1 gma500_gfx
drm                  170883  2 drm_kms_helper,gma500_gfx
i2c_core              16653  5 drm,drm_kms_helper,i2c_algo_bit,gma500_gfx,videodev
== Modesetting driver and dual monitor Setup ==
To setup different resolution for external monitor using [https://wiki.archlinux.org/index.php/Xrandr xrandr], {{Pkg|xf86-video-modesetting}} from official repo is needed. If you choose to use the git package ({{AUR| xf86-video-modesetting-git}}), remember to recompile it after a new version of [[Xorg]]. After installing, an [[Xorg]] file is needed to setup the driver. Use this for device section:
Section "Device"
    Identifier "gma500_gfx"
    Driver    "modesetting"
    Option    "SWCursor"      "ON"
{{Note|1= The above configuration file will replace the {{Pkg|xf86-video-fbdev}} driver. If you want to revert back, just replace {{ic|modesetting}} with {{ic|fbdev}}.}}
== Troubleshooting ==
=== Poor video performance ===
If you have problems playing 720p and 1080i videos, yes, that's normal while there are not accelerated XV drivers. But you can improve it up to the point of going well and smoothly for most videos (even HD ones) with these tricks:
# add <code>pm-powersave false</code> to <code>/etc/rc.local</code>. <code>man pm-powersave</code> for more info.
# use {{AUR| xf86-video-modesetting-git}} as indicated above.
# always use [[mplayer]] or any variant/gui. [[VLC]] and others are usually much more slower.
# substitute the normal mplayer with {{AUR| mplayer-minimal-svn}}, and compile with aggressive optimizations: <code>-march=native -fomit-frame-pointer -O3 -ffast-math'</code>. ([[Makepkg|About makepkg]])
# use {{AUR | linux-lqx}} as it is a very good performance kernel. Edit PKGBUILD so you can do <code>menuconfig</code> and make sure you select your processor and remove generic optimizations for other processors. ([[kernel |About kernels]])
=== Fix suspend ===
==== Old fbdev driver (default) ====
If suspend does not work, there are various quirk options you can try. First, make sure that you have {{Pkg|pm-utils}} and {{Pkg|pm-quirks}} [[pacman|installed]]. See the manpage for pm-suspend for a list of them all. One that has been reported to help is <code>quirk-vbemode-restore</code>, which saves and restores the current VESA mode.
To test it, open a terminal and use the following command
# pm-suspend --quirk-vbemode-restore
That should suspend your system. If you are able to resume, you'll want to use this option every time you suspend.
# echo "ADD_PARAMETERS='--quirk-vbemode-restore'" > /etc/pm/config.d/gma500
If you are not able to resume and you get a black screen instead, try the above quirk command with only '''one dash'''
# pm-suspend -quirk-vbemode-restore
{{Tip| If you stuck with a black screen after resume, be aware that besides the black screen, your system works fine. Instead of hard rebooting, you could try to blindly reboot your system, since the last thing you used before suspend was the terminal. Alternatively, if you have ssh enabled on your machine you could do it remotely.}}
==== modesetting xorg driver ====
On some machines, when using modesetting driver the screen gets messed up with random data. Although the computer still works, you must go to a console and kill X or reboot "blindly". This is not optimal, so here is a solution:
First, see your available screens and modes running {{ic|xrandr}}:
# xrandr
Screen 0: minimum 320 x 200, current 1280 x 720, maximum 2048 x 2048
LVDS-0 connected 1280x720+0+0 222mm x 125mm
  1280x720      60.0*+
HDMI-0 connected 1280x720+0+0 531mm x 298mm
  1920x1080      60.0 +
  1680x1050      59.9 
  1680x945      60.0 
  1400x1050      74.9    59.9 
  1600x900      60.0 
  1280x1024      75.0    60.0 
  1440x900      75.0    59.9 
  1280x960      60.0 
  1366x768      60.0 
  1360x768      60.0 
  1280x800      74.9    59.9 
  1152x864      75.0 
  1280x768      74.9    60.0 
  1280x720      60.0*
  1024x768      75.1    70.1    60.0 
  1024x576      60.0 
  832x624        74.6 
  800x600        72.2    75.0    60.3    56.2 
  848x480        60.0 
  640x480        72.8    75.0    60.0 
  720x400        70.1
Edit or create (giving executive permissions) {{ic|/etc/pm/sleep.d/99xrandr}}, writing the correct names and modes for your solution:
# turn off and on the screens so we force to clean video data
case "$1" in
xrandr --output LVDS-0 --off
xrandr --output HDMI-0 --off
xrandr --output LVDS-0 --off
xrandr --output HDMI-0 --off
xrandr --output LVDS-0 --mode 1280x720
*) exit $NA
In my case, I turn off both screens, and turn on only the main screen upon awakening. Feel free to customize to your needs.
On some machines, the screen turns on by default even when the system was put to sleep with the screen turned off, so you need to turn it off twice.
{{Note| This only works if you call {{ic|pm-suspend}} or {{ic|pm-hibernate}} inside [[X]]. If it is called from a daemon or a tty, it won't work.}}
=== Set backlight brightness ===
All that is needed to set the brightness is sending a number (0-100) to {{ic|/sys/class/backlight/psblvds/brightness}}. This obviously requires sysfs to be enabled in the kernel, as it is in the Arch Linux kernel. To set display to minimal brightness, issue this command as root:
# echo 0 > /sys/class/backlight/psb-bl/brightness
Or, for full luminosity:
# echo 100 > /sys/class/backlight/psb-bl/brightness
A very short script is available to do this with less typing written by [https://bbs.archlinux.org/viewtopic.php?pid=813074#p813074 mulenmar].
#! /bin/sh
sudo sh -c "echo $1 > /sys/class/backlight/psb-bl/brightness"
Simply save it as brightness.sh, and give it executable permissions. Then you can use it like so:
Set brightness to minimum:
./brightness.sh 0
Set brightness to half:
./brightness.sh 50
Sudo may obviously ask for your password, so you have to be in the sudoers file. A variation of this script can be found [https://bbs.archlinux.org/viewtopic.php?pid=1143245#p1143245 here].
{{Note|If changing {{ic|/sys/class/backlight/psblvds/brightness}} does not work, you may need to add {{ic|acpi_osi&#61;Linux acpi_backlight&#61;vendor}} to your [[kernel parameters]].  After rebooting, a new folder will appear under {{ic|/sys/class/backlight/}}; making changes to the {{ic|brightness}} file in that folder should work.  For example, in some Asus netbooks the backlight can be controlled by writing a value (0-10) to {{ic|/sys/class/backlight/eeepc-wmi/brightness}}.}}
=== Memory allocation optimization ===
You can often improve performance by limiting the amount of RAM used by the system so that there will be more available for the videocard. If you have 1GB RAM use <code>mem=896mb</code> or if you have 2GB RAM use <code>mem=1920mb</code>. Add the following parameters to your bootloader's configuration file.
Edit {{ic|/boot/grub/menu.lst}}
kernel /vmlinuz-linux root=/dev/sda2 ro mem=896mb
Edit {{ic|/etc/default/grub}}
Edit {{ic|/boot/syslinux/syslinux.cfg}}
APPEND root=/dev/sda2 ro mem=896mb
==See also==
* [http://www.kriptopolis.org/arch-linux-03#comment-66066 An experience about configuring Poulsbo (Spanish)]
* [https://wiki.ubuntu.com/HardwareSupportComponentsVideoCardsPoulsbo/ Ubuntu Wiki]
* [http://ubuntuforums.org/showthread.php?t=1984236 Ubuntu Forums]
* [http://blog.bodhizazen.net/linux/ubuntu-12-04-gma500-poulsbo-boot-options/ Ubuntu 12.04 gma500 (poulsbo) boot options (blog post)]

Latest revision as of 14:45, 25 November 2017

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