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- 31.05.2012 08:51
[blog...]
Poulsbo GMA500 driver is going mainline kernel
Some days ago, I was brave to do a "do-release-upgrade" call on my fit-pc2. Before it was 11.04 and now I am running Ubuntu 11.10.
But of course this only works with my own linux kernel. I had som 3.2.0-rc2 running from november. This kernel won't be replaced by Ubuntu. That's of course, what I wanted.
My first problem after upgrade was the music playback. It run too fast (!) and alsa threw error messages about buffer underrun.
So, I assumed some problems with my "old" kernel and the updated alsa userland libs/tools. And decided to upgrade the kernel by a fresh "git pull".
After this, the music is working again - but where is my gma500 driver gone? It moved from staging to mainline drivers/gpu/drm/gma500/ ?!
Alan Cox started last november the move. And now it will be finished with coming kernel release 3.3. The driver is called gma500_gfx now.
I'm really happy about this!
The only thing I had to change, is my kernel config.
There is still one issue open: On bootup, the X-server output is only shown in the top half of the monitor.
I found a simple workaround. I just stop and start the lightdm. This "fixes" the issue for me now. I hope this will be fixed in coming versions of the driver.
I place my fix in /etc/rc.local:
??stop lightdm
start lightdm
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- 4 Comment(s)
Full screen video?
I'm testing the new driver at the moment, but it still seems a bit rough for me. I'm on one of the 12.04 alpha builds. Upgrading everything seems to break X completely, but I'm not sure exactly why this is. I reverted to a base 12.04 install and am compiling one of the 3.3 RC kernels to see how things go.
Currently in 12.04 (3.2.1 kernel?) with the psb_gfx module the desktop is pretty smooth, but it won't detect the Fit-PC's default resolution and full screen video is too slow to be watchable; even
I haven't tried 12.04 alpha yet - and for sure, I won't do it before a release. I can't break the box because of lack of time.
In 12.04 the psb_gfx driver is working? I thought it was dead! That's why I'm testing the gma500_gfx since it was in staging.
With older releases of gma500_gfx, I had to add the following parameter to the kernel command line to get the right resolution: video=DVI-D-1:1440x900
(my monitor is connected via DVI to the DVI-Port of the fit-pc2).
Playing a mp4-video using mplayer with 1280x720 is too much for the box at the moment. But I haven't tried to optimize this.
Best,
Alexander
Hello Alexander,
I found your mail about the gma500 displaying only half screen on fit-pc2 from januari 2012.
The newest kernels still seem to have the problem.
Did you find already a solution for the problem?
Thanks in advance.
Seems to work now.
Hi Gert,
I tested it yesterday with recent git version (3.4.0+) and it seems to be fixed. But I had only time to reboot twice. Haven't tried it yet with cold boot-up.
In the meantime, I had a simple workaround. I added in my /etc/rc.local
stop lightdm
start lightdm
After restarting X11 the problem with half screen was always gone.
Best
Alexander