New Open Source Poulsbo Driver in 2.6.39 staging

It works pretty nicely - though just as a framebuffer device so far. A specialized Xorg userspace driver for the new staging kernel driver is expected sometime soon. It already supplies KMS and can be used with the fbdev driver of Xorg. So next time you want to try a new kernel you can at least get into a working X without much ado. And there will surely be at least a simple driver coming with new kernels now. The first steps have been taken. And of course, all this is hopefully just the beginning...

More about → New Open Source Poulsbo Driver in 2.6.39 staging

XBMC with VAAPI on Poulsbo (Intel GMA500) or other VAAPI Systems

It's not possible directly right now due to limitations of the existing GMA 500 drivers (IEGD, PSB, ...) and probably other vaapi drivers. But if you have mplayer-vaapi running, it's really easy - because you can set up xbmc to use external players with XBMC 10.

Read more »

More about → XBMC with VAAPI on Poulsbo (Intel GMA500) or other VAAPI Systems

Backlight Finally Works - Generic Poulsbo GMA 500 Fix via ACPI Video Interface

The trick is to go into drivers/acpi/video.c and remove the part that disables the acpi handling if there is an intel opregion present. The patch looks like this:

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 60ea984..ad8fc2d 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -2394,9 +2394,6 @@ static int __init acpi_video_init(void)
{
dmi_check_system(video_dmi_table);

- if (intel_opregion_present())
- return 0;
-
return acpi_video_register();
}

You can compile the module by getting the sources of your running kernel, cding into the acpi directory (drivers/acpi), applying the acpi patch and then executing

make -C /lib/modules/$(uname -r)/build M=$PWD video.ko

Then just sudo insmod ./video.ko.

Alright, here's the more elaborate version by Joey Lee hopefully entering the kernel soon:

---
drivers/acpi/video.c | 17 ++++++++++++++++-
include/linux/pci_ids.h | 1 +
2 files changed, 17 insertions(+), 1 deletions(-)

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 9865d46..25a70e0 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -88,6 +88,11 @@ static int acpi_video_bus_add(struct acpi_device *device);
static int acpi_video_bus_remove(struct acpi_device *device, int type);
static void acpi_video_bus_notify(struct acpi_device *device, u32 event);

+static const struct pci_device_id intel_drm_blacklist[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SCH_VGA) },
+ { } /* Terminating entry */
+};
+
static const struct acpi_device_id video_device_ids[] = {
{ACPI_VIDEO_HID, 0},
{"", 0},
@@ -2531,8 +2536,11 @@ static int __init intel_opregion_present(void)
#if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE)
struct pci_dev *dev = NULL;
u32 address;
+ int i;
+ bool in_blacklist;

for_each_pci_dev(dev) {
+ in_blacklist = 0;
if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
continue;
if (dev->vendor != PCI_VENDOR_ID_INTEL)
@@ -2540,7 +2548,14 @@ static int __init intel_opregion_present(void)
pci_read_config_dword(dev, 0xfc, &address);
if (!address)
continue;
- return 1;
+ for (i = 0; intel_drm_blacklist[i].device != 0; i++) {
+ if (dev->device == intel_drm_blacklist[i].device) {
+ in_blacklist = 1;
+ break;
+ }
+ }
+ if (!in_blacklist)
+ return 1;
}
#endif
return 0;
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 3bedcc1..78858b1 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -2669,6 +2669,7 @@
#define PCI_DEVICE_ID_INTEL_82443GX_0 0x71a0
#define PCI_DEVICE_ID_INTEL_82443GX_2 0x71a2
#define PCI_DEVICE_ID_INTEL_82372FB_1 0x7601
+#define PCI_DEVICE_ID_INTEL_SCH_VGA 0x8108
#define PCI_DEVICE_ID_INTEL_SCH_LPC 0x8119
#define PCI_DEVICE_ID_INTEL_SCH_IDE 0x811a
#define PCI_DEVICE_ID_INTEL_82454GX 0x84c4
--
1.6.0.2

More about → Backlight Finally Works - Generic Poulsbo GMA 500 Fix via ACPI Video Interface

Backlight Control on MSI U110 Netbook

I've managed to get the backlight working roughly as well! All I needed to do was to load msi-laptop with the parameter force=1. The problem is that there is so far very little scaling, I can only set brightness to 0 (very dark) or 1-8 (all "very bright"). Check for updates to get it working well with KDE.

I've contacted the driver developers and I hope we can make some progress on the drivers soon.

More about → Backlight Control on MSI U110 Netbook

Setting Up VAAPI Hardware Accelerated Video Decoding for Ubuntu 10.04 (example Intel Poulsbo GMA 500)

(For the more detailed guide for Ubuntu 9.10, which works much better for me, including suspend to ram, see here.)
This is just a really, really short basic howto for setting up the poulsbo X driver and VAAPI video acceleration on Ubuntu 10.04. I will post more details later.

1. Install the poulsbo driver:
sudo add-apt-repository ppa:gma500/ppa
sudo add-apt-repository ppa:gma500/fix
sudo apt-get update
sudo apt-get install poulsbo-driver-3d

2. Set up the Xorg.conf:

Section "DRI"
Mode 0666
EndSection

Section "Device"
Identifier "GMA500"
Option "AccelMethod" "EXA"
Option "DRI" "on"
Option "MigrationHeuristic" "greedy"
Option "IgnoreACPI" "yes"
Driver "psb"
EndSection

3. Reboot, check it's all working.

VAAPI
4. Download the right mplayer version:
wget http://www.splitted-desktop.com/~gbeauchesne/mplayer-vaapi/mplayer-vaapi-20100114.i686.tar.bz2
unp mplayer-vaapi*

5. Install the necessary libraries: (you can remove mplayer then, but it's the easiest method)
sudo apt-get install mplayer libgtop2-7

6. and play
mplayer -vo vaapi -va vaapi testfile.avi

If mplayer doesn't run because of missing libraries, this command will show which libraries are missing:
ldd mplayer-vaapi*/mplayer

Be quick, before the instructions change due to new repositories, libraries, etc... But don't everything to work flawlessly! My system doesn't even go into suspend, but crashes. Hence it can't come out of suspend, either. Backlight control still doesn't work for me. And I still have to do more testing on mplayer to see how smooth VAAPI actually is.

Theoretically, installing VLC 1.1.0 with VAAPI should be as easy as this:

sudo add-apt-repository ppa:c-korn/vlc && sudo apt-get update && sudo apt-get install vlc

But it didn't work out of the box for me and I didn't care about why. If you have hints, questions or - yes- comments, please post in the comments.

More about → Setting Up VAAPI Hardware Accelerated Video Decoding for Ubuntu 10.04 (example Intel Poulsbo GMA 500)

Saving 33% or 3 Watts of Power with your Netbook (here a Poulsbo system)

I've tried around a lot to see how much more power I can save on my system. An easy step with lots of success was to configure the laptop tools to run automatically. Check /etc/defaults/acpi-support and looks for LAPTOP_MODE, set it to true. Then you have to go to /etc/laptop-mode/ and configure first laptop-mode.conf and then the additional settings in the conf.d subdirectory. This could already save me at least 1 watt of power with very, very little hassle.

Poulsbo
I've tried around a lot with my X system, because it can draw a lot or little power depending on its settings. E.g. if you reduce the backlight you can save at least 2 watt power. Unfortunately the backlight controls on my system don't work - I'm happy I've managed to get the driver to run at all. (Check my special article on the MSI Wind U110 for more on that.) Hence at least for now I need to set my backlight to the level I want before booting Linux.

But I did find out that disabling vsync saves quite a substantial amount of power, I think about 0.5 watt. Most of the savings come from the cpu staying in idle longer on average then (about 22 msecs instead of about 4-8 ms). The catch is that with that setting enables, xvideo and vaapi no longer work after standby. Browsing is still fine, but probably no youtube, either. The whole system hangs when an application tries to use xv. So I had to disable the setting again - which actually was the step to put my netbook in a lower power mode than the carefully customized windows installation can manage, too bad.

If I pass it or any options (except debug) to the psb module during load, or load it myself during boot, X or suspend won't work at all or properly or properly after standby.

In the xorg.conf I have the standard settings for psb:

Option "AccelMethod" "EXA"
Option "DRI" "on"
Option "MigrationHeuristic" "greedy"
Option "IgnoreACPI" "yes"

Ralink Wifi
Another big one was the wifi adapter. Disabling it saves about 1.5-2 watts power, but of course I wanted to be able to have it running and save energy as well. I installed the newest driver from ralink's homepage. The important step was to go into the os/linux/ directory and edit the config.mk file to enable HAS_NATIVE_WPA_SUPPLICANT_SUPPORT=y, otherwise NetworkManager would no longer work with it. Then I studied the documentation and found the command "iwpriv ra0 set PSMode=Fast_PSP" put my card into a low power mode which still keeps a good and rather fast connection - better than in Windows, there this powersaving mode does not exist and the MAX_PSP is unusable.

Last Hint
A last additional hint is to kill knotify4.

Conclusion
In the end my system runs with 5.7 watts in a full KDE 4.3.2 X session. With mplayer and VAAPI I can now watch movies for at least 8 hours. A great demonstration of how far Linux has already come in saving power.

The only thing missing now is a working backlight control and a working XVideo without vsync would be great. Ok, an SSD would be great, too. So let me know if you have one you no longer need! ;) Or if you know how to fix the backlight control on a poulsbo system.

Maybe I should try to compile the IEGD driver for my system.

Update
I've manged to get it all running, including no_vsync, and videoacceleration before and after suspend. The trick is to do a double console switch after resume. Then VAAPI still works even after the suspend and resume - at least with xserver-xorg-video-psb version 0.36.0-0ubuntu1ppa9.10+1.

Update2
I've managed to get the backlight working roughly as well! All I needed to do was to load msi-laptop with the parameter force=1. The problem is that there is so far very little scaling, I can only set brightness to 0 (very dark) or 1-8 (all "very bright").

Update3
Check out this article with more general advice including how ensure your battery lives long and prospers. Backlight is fixed by now, I've written a patch for the psb driver (in testing at the ppa right now). With recently kernels, the power usage dropped down to 4.8 Watts without wifi! This means it lasts much longer in Linux than in Windows now.

More about → Saving 33% or 3 Watts of Power with your Netbook (here a Poulsbo system)

Intel Poulsbo Frustration Continues a Year Later

I'm also frustrated. I happily bought my netbook about exactly a year ago as many others in the hope that Intel would provide a well working open source driver, at least excluding 3d and VAAPI. Then I managed to get it running at all and then including 3d and vaapi (see http://linux-tipps.blogspot.com/2009/12/vaapi-accelerated-hd-video-on-msi-wind.html) and i was quite happy.

But I never managed to get several things to work:

• reliable standby (works once or twice if I haven't used 3d or vaapi)
• backlight regulation.

Does anyone know how to fix any of this?

Now I have the crazy situation that in Windows XP I can use standby and 3d but no HD, and in Linux I have better quality and VAAPI HD video playback and 3d, but no standby. And I'm frustrated.
It's such a nice netbook and performs so well otherwise, it's really sad and frustrating if drivers keep you from really enjoying what you bought.

I don't even know if and how long I will be update my OS. It's already unclear if I would lose VAAPI and/or 3D acceleration when I upgrade to Kubuntu 10.04 -- if X would still work at all. But I have no idea how long drivers will still be developed or at least maintained if there is no open source version.

So please Intel, if not an open source driver then at least release open source specs!!!

Update
I've actually managed to get standby working pretty reliably. The computer returns back from standby with amazing speed, too. The trick was to update the bios to the newest version. This fixes prior crashes during resume. But the crashes in Windows XP when I try to use DXVA persist.

Now the problem is that my wifi and sound drivers are still problematic after resume. My wifi driver causes kernel panics and my audio driver simply stops working...

More about → Intel Poulsbo Frustration Continues a Year Later

Poulsbo is Already working on Ubuntu 10.04

It's not a flawless support and currently without 3D, but there is a poulsbo driver for Ubuntu 10.04. (The link helps for all Ubuntu versions.)

You can download the driver here.

More about → Poulsbo is Already working on Ubuntu 10.04

Over 9 Hours of Video on Battery with the MSI Wind U110

After I've managed to set up the video acceleration, it was time to test if it's really as power efficient as claimed. I just tried that with some SD and HD video. HD video wouldn't play properly of course, so it's silly to compare battery times.

But with SD video and vaapi, I managed to get down to 6.1 watts (9.1 hours). Without vaapi it was around 6.3-6.5 watts (8.5 hours).

I used a few tricks to achieve this:

1. disabled wifi and bluetooth.
2. lowered the display brightness to minum (still good though). This has to be done before boot in 2.6.31.
3. moved the system to an SDHC card. While the power in standby is the same (5.7 watts both with only SDHC or only hard disk), the active power is much lower with the SDHC (only +0.5-2 watts instead of 3-5 watts).
4. used by powersave script to optimize the kernel settings for low power mode:

echo cpu

echo 1 | tee /sys/devices/system/cpu/sched_smt_power_savings

echo 1 | tee /sys/devices/system/cpu/cpu*/cpufreq/ondemand/ignore_nice_load

echo 95 | tee /sys/devices/system/cpu/cpu*/cpufreq/ondemand/up_threshold

echo 50 | tee /sys/devices/system/cpu/cpu0/cpufreq/ondemand/powersave_bias

echo

echo usb

echo 2 | tee /sys/module/usbcore/parameters/autosuspend

echo auto | tee /sys/bus/usb/devices/*/power/level

echo

echo misc

echo 1500 | tee /proc/sys/vm/dirty_writeback_centisecs

echo 0 | tee /sys/block/sdb/queue/rotational

# broken echo 10 | tee /sys/module/snd_hda_intel/parameters/power_save

# not better echo 1 | tee /sys/module/psb/parameters/disable_vsync

killall -q hald-addon-storage knotify4 NetworkManager

hciconfig hci0 down

More about → Over 9 Hours of Video on Battery with the MSI Wind U110

How to set up X and VAAPI Accelerated HD Video on the MSI Wind U110 (GMA500 - Poulsbo) and Ubuntu Karmic 9.10

The following guide is now slightly outdated as Ubuntu 10.04 is out and new drivers are necessary, also some of the repositories I originally used have disappeared. If you use Ubuntu 10.04, try following my much easier directions here instead. (The largest detriment to the Ubuntu 9.10 driver is a complete lack of suspend to ram for me. I will leave my guide for 9.10 online as reference, though. It seems to have been the first good description and I'm happy about the major online media coverage. :)

I've finally managed to get it running. Here is what I did. First you need to get Ubuntu 9.10 running with poulsbo. The first steps 1.-4. describe how to set up the driver for X. The second part (5.-10.) describes how to set up VAAPI and mplayer to get video acceleration. (There is already an early stage GMA500 driver for Ubuntu 10.04.)

The image shows the phoronix test suite benchmarking when I play Grey.ts in a loop (-loop 0) with mplayer and vaapi but without sound (-nosound) on my netbook. During the entire time, the CPU frequency is also downscaled to 800 Mhz. Compare to phoronix vdpau benchmark on a core 2 duo system (which obviously shows even less cpu usage, because the CPU is much more powerful) or the Atom and Nvidia ION benchmark on Phoronix.

CPU usage when playing a 10 minute fireworks recording in 1080p @ 50 fps without sound and then two FullHD movie trailers. The CPU is clocked at 800Mhz the entire time. The spike is caused by a bug in my test sequence: I didn't start a new mplayer process for new files but passed them all at once on the command line.

I can watch FullHD (1080p @ 50 fps + AC3) videos with about 30% or less CPU utilization (Atom@800 Mhz) on my netbook now. Looks really nice, too. Some videos produce artefacts, especially self-recorded AVCHD m2ts files. If you use the right demuxer, AVCHD videos play fine, but deinterlacing does not work. Sometimes the video seems not to run very smooth, etc. It's not perfect yet, don't expect too much! But most videos work perfectly, no matter what resolution.

The only real problem is with suspend to ram. You can't use suspend to ram or VAAPI at the same time: If you used VAAPI and try to suspend, the system doesn't suspend and/or crashes. If you suspend, then use VAAPI or even xv I think, the system crashes really hard. So suspend doesn't really work as expected yet. I think the sound also doesn't work properly after suspend. Suspend works fine for me even after resume if I do a double console switch (Ctrl-Alt-F1 wait until you see the console, then Ctrl-Alt-F7).

Here's what you need to do

1. Basically you add the GMA500 Repositories for Ubuntu 9.10 (karmic) and 10.04 (Lucid) to /etc/apt/sources.list.d/mobile.list. (If the entry below doesn't work, check this page.)

sudo add-apt-repository ppa:gma500/ppa && sudo apt-get update

2. Then you install the poulsbo-driver-3d including the firmware and everything.

2.a. Check if you can load the psb module: sudo modprobe psb. If you see this in dmesg instead of a switch to the correct resolution,

"kernel BUG: unable to handle kernel NULL pointer dereference at (null)" (2.6.31)

you need a manual hack to get the driver working, as I just reported.

3. Once that's done, for a more stable and speedy operation, you need to add an /etc/X11/xorg.conf:

Section "Device"

Identifier "GMA500"

Option "AccelMethod" "EXA"

# someone suggested UXA? but that's for the i965 drivers

Option "DRI" "on"

Option "MigrationHeuristic" "greedy"

Option "IgnoreACPI" "yes"

Driver "psb"

EndSection

Section "DRI"

Mode 0666

EndSection

4. Reboot and make sure that it works! If X doesn't work properly yet, VAAPI won't, either. After a short black screen, you should be greeted in the correct resolution. Full screen xv video should already work fine. Suspend to RAM also worked perfectly at this point for me.

If  the system goes to DPMS standby and from there switches to other modes (DPMS suspend, etc.), then my screen actually turns on again (showing all black with backlight active). So make sure you chose only one setting for DPMS. A constantly running screen is not good at all.

VAAPI Video Acceleration setup

Now comes the part where we install the hardware decoding acceleration. If you just want X you can stop now. ;) This is written for Ubuntu 9.10 with old repositories, so 5+6 might not be necessary anymore or work for Ubuntu 10.04!

5. Install the Libva library from http://www.splitted-desktop.com/~gbeauchesne/libva/pkgs/i386/libva1_0.31.0-1+sds8_i386.deb. This replaces your current libva1 with a newer version.  also works for me. Don't forget to install the -dev version (http://www.splitted-desktop.com/~gbeauchesne/libva/pkgs/i386/libva-dev_0.31.0-1+sds8_i386.deb) as well if you want to compile mplayer later.

wget http://www.splitted-desktop.com/~gbeauchesne/libva/pkgs/i386/libva1_0.31.0-1+sds8_i386.deb
http://www.splitted-desktop.com/~gbeauchesne/libva/pkgs/i386/libva-dev_0.31.0-1+sds8_i386.deb&& sudo dpkg -i libva1_0.31.0*i386.deb

6. Create a link of your video driver to the vaapi driver directory:

sudo ln -s /usr/X11R6/lib/modules/dri/psb_drv_video.so /usr/lib/va/drivers/

A. Precompiled setup. (You can alternatively skip to part B: compiling the source code setup)

7. Download and unpack the precompiled mplayer:

http://www.splitted-desktop.com/~gbeauchesne/mplayer-vaapi/mplayer-vaapi-20090914.i686.tar.bz2

8. Install a normal mplayer and libmad with apt-get.

sudo apt-get install mplayer libmad0

9. Unpack mplayer and create necessary links to the libraries it expects.

"ldd mplayer" tells you what library (names) mplayer expects.

Just to go /usr/lib and create links to them:

e.g

ln -s libx264.so.67 libx264.so.65

This should work as long as your libraries are newer than the expected ones. It may actually work out of the box in Ubuntu Jaunty.

10. Start mplayer from the package you downloaded:

e.g. ~/mplayer-vaapi-20090914.i686/mplayer -fs -vo vaapi -va vaapi HDtest.avi

B. Compiling the Source Code

I've also manged to get the source code to work. This is less bothersome, because you need not link the libaries. Hence less man hours, but more disk space and computer hours for compiling. Didn't take as long as I feared, though. And it's using a slightly newer version of mplayer-vaapi, which includes some rudimentary OSD in vaapi mode now.

7. Install the build environment:

sudo apt-get build-dep mplayer

sudo apt-get install libdrm-dev

wget http://www.splitted-desktop.com/~gbeauchesne/libva/pkgs/i386/libva-dev_0.31.0-1+sds8_i386.deb && sudo dpkg -i libva-dev_0.31.0-1+sds8_i386.deb

maybe: sudo apt-get -f install

8. Download the source at http://www.splitted-desktop.com/~gbeauchesne/mplayer-vaapi/mplayer-vaapi-20091106-FULL.tar.bz2. Unpack it and execute the checkout-patch-build.sh.

9. Check if it works, e.g.

mplayer -fs -vo vaapi -va vaapi ~/HDtest.avi

10.

sudo make install.

X. Done! Enjoy e.g. a nice HD trailer for a start! Post your results! I can recommend using it in smplayer for more comfort(e.g. automatically continue where you left of last). If it crashed, check out by blog entry about smplayer crashing in vaapi mode.

Update: It turns out deinterlacing not working is not due to VAAPI, but a limit in the psb driver. It works with the current iegd driver and other drivers from AMD and NVIDIA (press the D putton in mplayer I think). If I could just get one of those iegd drivers... Thanks Gwenole from splitted-desktop.com for answering my email and of course for writing the mplayer-vaapi patches in the first place! He seems to be the absolute VAAPI expert.

Also some experiments show that I can attach an external screen and watch videos with VAAPI on it. That means I should be able to actually use the netbook for decoding HD video and displaying it on an external screen. (But it does not work for me with except in mirror or single display mode.) Only thing missing now is a digital display port to connect a FullHD display... ;)

You might also be interested in Surround Sound and Battery Life
And I did get a USB surround sound card working wonderfully now. Also here's some advice I wrote on decreasing your power consumption.

More about → How to set up X and VAAPI Accelerated HD Video on the MSI Wind U110 (GMA500 - Poulsbo) and Ubuntu Karmic 9.10

X Video finally works - Poulsbo and Linux on the MSI Wind U110 - Fix for BUG: kernel NULL pointer dereference at 00000000

If you tried to get poulsbo to run on your system and you get a message like this, you should try the fix posted below.

"kernel BUG: unable to handle kernel NULL pointer dereference at 00000000" (2.6.28)

"kernel BUG: unable to handle kernel NULL pointer dereference at (null)" (2.6.31)

Thanks to a post on Ubuntu's bugzilla, the poulsbo video module now finally works on my MSI Wind U110 (full review & installation guide). Download the psb-kernel-source module You only have to comment out the two lines in intel_lvds.c starting with

if (edid)
....

e.g.
/* if (edid)
drm_add_edid_modes(output, edid); */

Then reconfigure the package and it should be recompiled. The next time you start it, it should work instead of creating kernel BUG

Update:

Xvideo actually works better than in Directx video in Windows XP, where I often see blocky video scaling. The CPU usage is not too high, either. Currently it's only working under Ubuntu 9.04 for me. Though I had managed to compile the module with kernel 2.6.30 before, I don't remember how I did that... And I haven't gotten actual video acceleration to work yet.

Of course I'll keep you updated and I'll post a little howto once it's all working. But feel free to ask, anyway. And thanks so much to the person from the Ubuntu bugzilla who helped me to finally get it all working!!!

Update2: Keep checking the page. I will post a link to an archive with a script that will manage the compilation in Ubuntu 9.10. If someone could help me figure out how to, I'd love to create, upload and post a .deb for dkms so it all works automatically... Or ultimately, we could modify the driver to check for the MSI's signature and then skip the edid check.

I've created a package for Karmic that you can use to manually install the driver with the fix already applied: http://www.megaupload.com/?d=BB23R7K2. Extract it and execute the script make_psb.sh, then reboot and try to modprobe psb. Let me know when the 10 downloads run out and it it works for you.

Update3: Here is a step by step howto. It explains setting up X and then VAAPI (hardware video decoding) in Kubuntu 9.10.

My script for making the psb module out of the package:

KERNEL=/lib/modules/`uname -r`/

make KERNELRELEASE="$(uname -r)" LINUXDIR="/lib/modules/$(uname -r)/build" DRM_MODULES=psb || exit 1;

sudo cp drm.ko $KERNEL/kernel/drivers/gpu/drm/drm.ko

sudo mkdir -p $KERNEL/updates/dkms

sudo cp psb.ko $KERNEL/updates/dkms/psb.ko

ls -l $KERNEL/kernel/drivers/gpu/drm/drm.ko $KERNEL/updates/dkms/psb.ko

sudo depmod -a

More about → X Video finally works - Poulsbo and Linux on the MSI Wind U110 - Fix for BUG: kernel NULL pointer dereference at 00000000