[Intel-gfx] Regression DRM/i915/KMS: VGA connector unusable after 2.6.31-rc8-git1, DVI connector ok

[ykzhao]

On Wed, 2009-09-09 at 06:26 +0800, Jesse Barnes wrote:
> cc'ing the intel-gfx list.
> 
> On Wed, 09 Sep 2009 00:19:04 +0200
> Knut Petersen <Knut_Petersen at t-online.de> wrote:
> 
> > Hi everybody!
> > 
> > During the release cycle of the 2.6.31-rc* kernels KMS started to work
> > on my computer.
> > 
> > Booting with a monitor attached to both the VAG and the DVI
> > connectors, kernel 2.6.31-rc8-git1
> > detects both monitors correctly and sets the native video mode.
> > 
> > Booting the same configuration with kernel 2.6.31-rc8-git2 ...
> > -rc9-git1 gives a different result:
> > the DVI-attached monitor is still working perfectly, the VGA-attached
> > monitor does not detect a
> > valid video signal and switches off.
> > 
> > Hardware: AOpen i915GMm-hfs,  Pentium-M 1.86 MHz,  2GB RAM
> > The Aopen i915GMm-hfs is a  desktop board with a mobile Chipset:
> > 
> > 00:00.0 Host bridge: Intel Corporation Mobile 915GM/PM/GMS/910GML
> > Express Processor to DRAM Controller (rev 04)
> > 00:02.0 VGA compatible controller: Intel Corporation Mobile
> > 915GM/GMS/910GML Express Graphics Controller (rev 04)
> > 00:02.1 Display controller: Intel Corporation Mobile 915GM/GMS/910GML
> > Express Graphics Controller (rev 04)
> > 
> > Config: AGP/DRM/I915 all compiled into kernel, KMS enabled.
> > 
> > Log_Broken contains the result of "cat boot.msg | grep -i drm" of a
> > boot with 2.6.31-rc8-git2,
> > Log_OK contains the result of "cat boot.msg | grep -i drm" of a boot
> > with 2.6.31-rc8-git1
> > 
> > As a black monitor is not a nice gift I think this should be fixed
> > before the final release of 2.6.31.
Will you please try the latest git tree and see whether the issue can
still be reproduced?
Thanks.
> > 
> > cu,
> >  Knut
> 
>