Comment 275 for bug 252094

VERY interesting. I am going to try this on my laptop tonight. What
is the procedure to fail back if the new driver has issues? Just
remove the backports repo, and reinstall original
xserver-xorg-video-intel from the main repo?

Jason

On Fri, Jan 16, 2009 at 2:30 PM, Luciano Ziegler
<email address hidden> wrote:
> It's the Plain Ibex 8.10 Kernel 2.6.27, My graphic card is a Intel
> Corporation Mobile GM965/GL960. I just set up the backports and the new
> driver was available.
>
> --
> [i965, etc.] Poor graphics performance on Intel
> https://bugs.launchpad.net/bugs/252094
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in X.org xf86-video-intel: Confirmed
> Status in "xserver-xorg-video-intel" source package in Ubuntu: In Progress
>
> Bug description:
> I experience significant performance loss with ubuntu 8.10 alpha 3 with my Intel DG965WH based system and SVDO/ADD2 video card. Actually, the performance loss started with ubuntu 8.04.1; I upgraded to see if there was any performance gain with the new version. While "glxgears" produced values between 1580 fps and 1496 fps with ubuntu 7.04 and 7.10, respectively, now I can only achieve something like 445 fps with ubuntu 8.10 alpha 3. I get an error message when starting glxgears that "TTM" was not available and classic mode would be used. Similary, the flight simulator "flightgear" achieves frames rates of 1-2 fps only.
> My suspicion is that some of the hardware acceleration features of the X3000 system are not being used, and I don't know how to activate them with the new xorg.conf structure and the underlying automatic configuration approach.
> I would like to see the graphics performance go back to the values achieved in ubuntu 7.04 and 7.10.
> Your help / comment is greatly appreciated.
> Bingo
>
> [Update]
> Intel upstream has been in a multi-year effort to rearchitect X and the Intel 2D and 3D driver to provide better performance. While this work is underway, people are seeing variations in performance levels from version to version, for a variety of reasons. There are probably multiple unrelated bugs being reported to this bug report.
>
> It is important to note and remember that glxgears is *not* a benchmark tool. It simply measures how fast the driver writes images to the screen, whereas most 3D applications are limited by render speed, not merely blit speed. Instead use a 3D game (flightgear, tremulous, etc.) that has a real rendering workload to make comparisons.
>
> If you're definitely seeing performance problems, please do not comment onto this bug report - it's too lengthy and rambling already, and your issue will just be lost in the noise. Instead, make a new report and please be as specific as possible with exact steps to reproduce and as much detail and logs as you can. See http://wiki.ubuntu.com/X/Reporting for tips on making a good X bug report.
>