Comment 211 for bug 120834

@PCC:

With the Jaunty Alpha update I found that most, if not all of those issues
were solved, but only when I explicitly told it to use UXA. If I left this
setting out of the Xorg.conf then those framerate issues were definitely
there as it was using the older DRI (not DRI2) for acceleration.

I have that exact laptop.

- Shane

On Thu, Feb 12, 2009 at 6:38 AM, PCC <email address hidden> wrote:

> I have similar issues on my ThinkPad T61 with GM965 running ubuntu with
> 2.6.28.4 kernel.
>
> The screen would become corrupted with the 2.4x or 2.6x intel server and
> it crashes frequently. For example thinktanksdemo would show a broken
> screen (portion of screen inverted or shown at the wrong place), GL
> screensavers would have a flashing row at the bottom and use tones of
> CPU.
>
> However 2.2x server seems surviving well with none of the above issues
> but it would fill up Xorg.0.log over time by showing the available
> settings and configurations over and over again.
>
> I am not sure whether glxgears have changed over the releases, but there
> is a huge difference in frame rate on this machine across releases.
>
> I have over 1000 FPS by using the 2.2x server and libraries, about 600
> FPS for 2.4x, and less than 60 FPS (not 600) for the 2.6x. It is
> definitely going the wrong way!
>
> Can anybody check what have changed for GM965 from 2.2 to 2.6 and figure
> out what went wrong?
>
> As for Xorg.conf, I am using virtually no configurations and let the
> server discover the best configuration on start up under all streams.
>
> For now, I am running intrepid stream of Ubuntu with xserver and
> libraries downgraded to hardy (2.2x). Before the new stuff is back
> ported, I am still OK.
>
> I have tried the most updated xserver and libraries available from time
> to time, unfortunately none worked out and I had to fall back to 2.2 to
> get a functional screen.
>
> Hopefully somebody would figure it out soon.
>
> Thanks,
>
> --
> [i965] intel gm965 freezes with 3d applications
> https://bugs.launchpad.net/bugs/120834
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in X.Org X server: Fix Released
> Status in "mesa" source package in Ubuntu: Fix Released
> Status in "xserver-xorg-video-intel" source package in Ubuntu: Incomplete
> Status in mesa in Ubuntu Hardy: Confirmed
> Status in xserver-xorg-video-intel in Ubuntu Hardy: Invalid
> Status in "xserver-xorg-video-intel" source package in zUbuntu: Invalid
>
> Bug description:
> On some Intel GM965 machines, running OpenGL applications (eg. Blender,
> Second Life, the Endgame screensaver, Scorched3D) can crash the system.
>
> Symptoms: Colours go funny, then screen flashes between off and black with
> 'please wait' cursor about 10 times, then stops; does not respond to
> Ctrl+Alt+F1 or Ctrl+Alt+Backspace, but does reboot on Alt+SysRq+b. Logs the
> line
> Error in I830WaitLpRing(), timeout for 2 seconds
> in /var/log/Xorg.0.log.old
>
> (Please note that this is not the only X crash bug; if you cannot find
> an exact match for your symptoms then please file a new bug.)
>
> Workaround: Adding
> Option "DRI" "false"
> to the graphics controller Device section of /etc/X11/xorg.conf avoids this
> bug, but may drastically reduce performance.
>
> This bug has been reported upstream and you can follow the link to xorg
> bugzilla, but as of 29.12.07 no developer managed to reproduce this bug (how
> to trigger it seems to be hardware dependent, with some i965s not appearing
> to have it at all) so it will be very hard to fix unless that changes
> if you are suffering from this bug please go to xorg bugzilla and report
> your hardware specifics.
> also please edit this bug description and add the name and exact model of
> your affected laptop.
>
> list of affected laptops:
> Acer Travelmate 6292
> Asus S62E Santa Rosa 965
> dell D830
> Dell 630
> Dell Inspiron 1420
> Dell Inspiron 1420n
> Dell Inspiron 1525 (new)
> Dell Latitude D630
> Dell Latitude D830
> Dell Vostro 1310
> Dell XPS M1330
> HP Compac 6510b
> HP Compaq 6710b
> Thinkpad T61
> Thinkpad X61 Tablet
> Thinkpad X61s
> Apple Macbook (3,1/Santa Rosa)
> Acer Aspire 5315-052G12Mi
> Acer Extensa 5220-050508Mi
> Lenovo 3000 N200 (TY2BBGE)
> Sony vaio CR160
>
> also if you have one of these laptops and are not affected please tell
> us!
>
>