Since the upgrade from xorg-server 1.3 to 1.5 the hardware acceleration for a Radeon 9000 graphics card is not working. It seems the PCI Id is wrong. It should be "pci:0001:01:08.0" but X11 tries to use "pci:0000:01:08.0". Reproducible: Always Steps to Reproduce: 1. Start X11, eg. startx 2. Start glxgears (wrong colors and bad performance) Actual Results: The Performance of the Gfx card is very bad and all colors are wrong if you use OpenGL (Mesa). Eg. glxgears, blender. Expected Results: Performance of Gfx card as good as in xorg-sever 1.3 and correct colors. I'm using Gentoo Linux (CPU: PowerPC G4) and updated my xorg-server to the version 1.5.3-r6 and now my X11 performance for OpenGL (Mesa 7.3-r1) is bad and has wrong colors (eg. glxgears). I did a little investigation of this problem and saw this: xorg-server-1.5.3-r6 has a library called libglx.so. This library uses drmOpenOnce(NULL, "pci:0001:01:08.0", ...) to get the graphics card. lspci reports 0001:01:08.0 VGA compatible controller: ATI Technologies Inc Radeon RV250 If [Radeon 9000] (rev 01) So the PCI Bus ID seems to be correct. libdrm-2.4.5 has the function drmOpenOnce(). This function goes down to drmOpen(NULL, "pci:0001:01:08.0") and drmOpenByBusid("pci:0001:01:08.0"). Now drmGetBusid(fd) is called and returns "pci:0000:01:08.0". Which is wrong, because it differs from the original PCI Bus ID. So my graphics card will not be used with hardware accelerated OpenGL. drmGetBusid() calls the kernel module drm via IOCTL DRM_IOCTL_GET_UNIQUE. (see file drm_ioc32.c). So is it a bug in the kernel or libdrm?
This is indeed really weird. You might want to test ~ppc packages for xorg-server, mesa and xf86-video-ati (and all X protos and libs) to make sure the bug is fixed or not. Could you open a bug in FreeDesktop's bugzilla [1] and paste the url here so we can track the issue? Thanks [1] https://bugs.freedesktop.org/
Bug entered in freedesktop.org: https://bugs.freedesktop.org/show_bug.cgi?id=23745
Reopening
Thanks for the bug report. Let's track the bug there directly. Closing with the proper resolution. Thanks.
