Bug#345758: No direct rendering with recent kernels (workaround)
Can you please add the workaround described below to the DRM problems
with kernels 2.6.14+15 to next release of Xorg. Obviously the kernel
module patch will not be included until kernel 2.6.16.
For direct rendering with MGA graphics cards use the following option in
the Device section of xorg.conf:
Option "OldDmaInit" "true"
On Thu, 2006-01-05 at 00:45 +0100, Svante Signell wrote:
> On Tue, 2006-01-03 at 11:58 +0100, Svante Signell wrote:
> > Subject: xserver-xorg: No direct rendering with recent kernels
> > Package: xserver-xorg
> > Version: 6.9.0.dfsg.1-1
> > Severity: important
> >
> > *** Please type your report below this line ***
> > Recent kernels 2.6.14-2-686-smp and 2.6.15-rc4-686-smp does not have
> > direct rendering enabled. Kernel 2.6.11-1-686-smp works OK.
> >
> > Kernel 2.6.14:
> > ~$ LIBGL_DEBUG=verbose glxgears
> > libGL error: XF86DRIQueryDirectRenderingCapable returned false
> > 598 frames in 6.2 seconds = 97.027 FPS
> > 560 frames in 6.4 seconds = 87.010 FPS
> > 560 frames in 6.4 seconds = 88.052 FPS
> >
> > Kernel 2.6.11:
> > ~$ LIBGL_DEBUG=verbose glxgears
> > libGL: XF86DRIGetClientDriverName: 1.2.1 mga (screen 0)
> > libGL: OpenDriver: trying /usr/X11R6/lib/modules/dri/mga_dri.so
> > drmOpenByBusid: Searching for BusID pci:0000:01:00.0
> > drmOpenDevice: node name is /dev/dri/card0
> > drmOpenDevice: open result is 4, (OK)
> > drmOpenByBusid: drmOpenMinor returns 4
> > drmOpenByBusid: drmGetBusid reports pci:0000:01:00.0
> > 2440 frames in 5.0 seconds = 487.941 FPS
> > 2526 frames in 5.0 seconds = 505.015 FPS
> > 2519 frames in 5.0 seconds = 503.690 FPS
> >
>
> It seems that this bug has been solved in the DRM module in CVS in
> November, see https://bugs.freedesktop.org/show_bug.cgi?id=4797
>
> The problem is that the changes are not included in kernels 2.6.14 and
> 2.6.15 (released yesterday). I've asked on the DRI-devel mailinglist if
> a patch can be made available that can be included when building these
> kernels. If not, a workaround is to add the Option "OldDmaInit" "true"
> in the Device section of xorg.conf for the card as a workaround. My
> problems were solved by this setting for the card, an MGA G400 DH AGP.
>
>
--
Svante Signell <svante.signell@telia.com>
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