On 965G glxgears fails with DRM_I830_CMDBUFFER: -22

Bug #66645 reported by Alex Willmer on 2006-10-17
Affects Status Importance Assigned to Milestone
mesa (Debian)
Fix Released
mesa (Ubuntu)

Bug Description

glxgears and other opengl programs fail as follows:

alex@bertha:~$ glxgears

This is using latest libdrm, kernel, xorg on an intel x3000/G965 chipset. libgl1-mesa-glx 6.5.1~20060817-0ubuntu3 is installed.

Alex Willmer (alex-moreati) wrote :
Alex Willmer (alex-moreati) wrote :
Alex Willmer (alex-moreati) wrote :
Erik Andrén (erik-andren) wrote :

I can confirm this bug

Changed in mesa:
status: Unconfirmed → Confirmed
Paul Sladen (sladen) wrote :

Is this on 6.06LTS, 6.10 or fiesty?

Erik Andrén (erik-andren) wrote :

Both Edgy and Feisty. I haven't tried Dapper.

Benoit Pruneau (bpruneau) wrote :

For information, on Debian, they have already find the trouble:


But I don't know how to do that with Ubuntu, I'm a beginner in Linux, with Ubuntu 6.10

Paul Sladen (sladen) wrote :

IIRC, this was already applied for 6.10.

Changed in mesa:
status: Unknown → Unconfirmed
Peter Cordes (peter-cordes) wrote :

It's not fixed in AMD64 Edgy. I had to apt-get source ... to build with -fno-strict-aliasing. That fixed that problem.

Changed in mesa:
status: Unconfirmed → Confirmed
Changed in mesa:
status: Confirmed → Fix Released
Alex Willmer (alex-moreati) wrote :

I can confirm this is still not fixed for Feisty. Recompiling mesa 6.5.1~20060817-0ubuntu4 with -fno-strict-aliasing fixed the problem.

Modified configs/debian:

DEBIAN_COMMON_CFLAGS = -ansi -pedantic -Wall -fPIC -std=c99 \

Confirmed as well here. Could someone produce a package with -fno-strict-aliasing added to CFLAGS/CXXFLAGS in configs/debian and configs/debian-static?

Alex Willmer (alex-moreati) wrote :

I think I've done this right, patch made against current Feisty mesa, fixes the CMDBUFFER error.

A warning is still printed to the console:
libGL warning: 3D driver claims to not support visual 0x5a

This bug seems closely related to latest comments in bugs 62135 & 61951. Following this patch glxgears and ppracer work. Compiz does not, windows appear as blank boxes.

Alex Willmer (alex-moreati) wrote :

I hacked together some custom packages from Debian experimental for libdrm_2.3.0 and mesa_6.5.2. Using these, the "libGL warning: 3D driver claims to not support visual 0x5a" is still reported.

Following installation of these packages and an X server restart desktop-effects half works. Windows draw with a thick black edge surrounding the border, tool tips have a similar white edge. After a short time window contents gradually fail to draw, widgets and icons become blank on hover. Resizing a window restores it's contents.

It would appear there's more to fixing compiz on 965G than upgrading mesa/libdrm.

Alex Willmer (alex-moreati) wrote :

The meaning of the libGL warning can be found on the Gentoo Wiki:

Visual 0x5a is for 23bit, i810 driver supports only up to 24bit

Alex Willmer (alex-moreati) wrote :

The upgrade in feisty to mesa 6.5.2 and libdrm 2.3.0 has fully fixed this bug. The visual 0x5a message remains, but isn't relevant.

Changed in mesa:
status: Confirmed → Fix Released
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