I just tried google earth and got a pretty good picture. When zooming in, I noticed two things. The first is a distortion, when adjusting to a low viewing angle and viewing height. The second is a visible diagonal line through the whole picture. I know, that the desciptions are not too detailed, so I took two screen shoots, that are attached. Versions: Kernel DRM Module from Kernel 2.6.28 (relevant modules: drm, i915) Mesa from Debian experimental: 7.3-1 Intel-DDX: 2.6.1-1 I get similar result whether I use EXA or UXA acceleration (although I disable UXA now, as I get frequent look ups). PS: The small squares indicating a picture in google earth are sometimes correctly show with their icon, but sometimes they are just shown as white squares.
Created attachment 22440 [details] diagonal line through image
Created attachment 22441 [details] messed up rendering viewed from low viewing angle
Created attachment 22442 [details] Output of glxinfo mblaesing@enterprise:~$ LIBGL_DEBUG=verbose glxinfo 2>&1 1> glxinfo libGL: XF86DRIGetClientDriverName: 1.9.0 i965 (screen 0) libGL: OpenDriver: trying /usr/lib/dri/tls/i965_dri.so libGL: OpenDriver: trying /usr/lib/dri/i965_dri.so drmOpenDevice: node name is /dev/dri/card0 drmOpenDevice: open result is 4, (OK) drmOpenByBusid: Searching for BusID pci:0000:00:02.0 drmOpenDevice: node name is /dev/dri/card0 drmOpenDevice: open result is 4, (OK) drmOpenByBusid: drmOpenMinor returns 4 drmOpenByBusid: drmGetBusid reports pci:0000:00:02.0 libGL error: Can't open configuration file /etc/drirc: No such file or directory. mblaesing@enterprise:~$
my suspicion is that this effect is related to the RHW workaround, thus it'll be chipset-dependent. Please attach Xorg.0.log and dmesg.
Created attachment 22585 [details] Dmesg
Created attachment 22586 [details] Xorg.0.log What is the meaning of RHW?
(In reply to comment #4) > my suspicion is that this effect is related to the RHW workaround, thus it'll > be chipset-dependent. Please attach Xorg.0.log and dmesg. > You are right. It works fine on GM45.
Maybe this is related, maybe not. We got several bug reports on 965 rendering glitches in ubuntu (bugs linked from the URL below). I consistently see rendering glitches on 965 using ubuntu intrepid and also ubuntu jaunty as of feb 3rd. It looks like some textured are rendered black and/or possibly not aligned well. Running the atunnel screensaver is the best way to repro the glitches. I've attached screenshots of atunnel on intrepid/jaunty here: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/330476
fixed in mesa commit 68915fd6fac44dd000080298e3afb0669e8754aa Author: Xiang, Haihao <haihao.xiang@intel.com> Date: Thu Feb 26 17:31:01 2009 +0800 i965: fix for RHW workaround
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