Problems with KMS on drm-intel-next branch

[Wang, Zhenyu Z]

On 2009.03.17 14:38:44 +0800, Mike Lothian wrote:
> 2009/3/17 Zhenyu Wang <zhenyu.z.wang at intel.com>:
> > On 2009.03.17 07:25:52 +0800, Mike Lothian wrote:
> >> 2009/3/16 Jesse Barnes <jbarnes at virtuousgeek.org>:
> >> > On Sunday, March 15, 2009 6:23:59 am Mike Lothian wrote:
> >> >> Hi
> >> >>
> >> >> I've been using KMS  on Intel since it was merged with 2.6.29. In
> >> >> parallel to this I've also been testing the drm-intel-next branch of
> >> >> anholt's git tree
> >> >>
> >> >> This stopped working for me about 2 weeks ago.
> >> >>
> >> >> When the kernel normally switches to the correct resolution on
> >> >> mainline the drm-intel-next kernel turns the screen black then slowly
> >> >> gets brighter from the edges going through purple into white, showing
> >> >> all the imperfections in the screen
> >> >>
> >> >> I'm not sure what's happening in the background as my laptop never
> >> >> gets to the point where I can SSH in.
> >> >>
> >> >> It's a:
> >> >>
> >> >> 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4
> >> >> Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)
> >> >> 00:02.1 Display controller [0380]: Intel Corporation Mobile 4 Series
> >> >> Chipset Integrated Graphics Controller [8086:2a43] (rev 07)
> >> >>
> >> >> Hope this helps in some way
> >> >
> >> > If it used to work but now doesn't, you may be able to use "git bisect" to get
> >> > down to the offending commit.  Either way, please file a bug at
> >> > bugs.freedesktop.org for this problem if one doesn't already exist.
> >> >
> >> > Thanks,
> >> > --
> >> > Jesse Barnes, Intel Open Source Technology Center
> >> >
> >>
> >> Hi I've just finished bisecting and the "dodgy" commit was:
> >>
> >> drm/i915: Use LVDS config in Driver feature BDB for integrated LVDS check
> >> ed356c1946edc4017799de0371ef229bffa5e72c
> >>
> >> I hope this helps
> >
> > That commit has drawbacks and needs rework. Could you attach bios_reader output?
> > The utility is under xf86-video-intel/src/bios_reader, make sure you're on git tip
> > or 2.7 branch.
> >
> > --
> > Open Source Technology Center, Intel ltd.
> >
> > $gpg --keyserver wwwkeys.pgp.net --recv-keys 4D781827
> >
> > -----BEGIN PGP SIGNATURE-----
> > Version: GnuPG v1.4.9 (GNU/Linux)
> >
> > iEYEARECAAYFAkm+9IEACgkQsQQaM014GCdoowCfd2ge7OUM18OrEbWXRp3lffUP
> > 1HAAoIf1/esrspgHu5YXz+XN8T2IFXDb
> > =irEf
> > -----END PGP SIGNATURE-----
> >
> >
> 
> OK I'm attaching the rom
> 
> Just so you know the BIOS in this laptop is a joke, just do a search
> for Samsung R510 on bugs.kernel.org
> 
> I also always have DVI2 showing up as connected when there is only a
> VGA, HDMI and the laptop screen
> 
> Hope this helps
> 

It looks your bios does have correct LVDS config in VBT:

Driver feature Data Block:
Boot Device Algorithm: os default
Block display switching when DVD active: yes
Allow display switching when in Full Screen DOS: no
Hot Plug DVO: yes
Dual View Zoom: no
Driver INT 15h hook: no
Enable Sprite in Clone Mode: yes
Use 00000110h ID for Primary LFP: no
Boot Mode X: 1024
Boot Mode Y: 768
Boot Mode Bpp: 8
Boot Mode Refresh: 60
Enable LFP as primary: no
Selective Mode Pruning: no
Dual-Frequency Graphics Technology: no
Default Render Clock Frequency: high
NT 4.0 Dual Display Clone Support: no
Default Power Scheme user interface: CUI
Sprite Display Assignment when Overlay is Active in Clone Mode: secondary
Display Maintain Aspect Scaling via CUI: yes
Preserve Aspect Ratio: no
Enable SDVO device power down: no
CRT hotplug: yes
LVDS config: Integrated LVDS
Define Display statically: no
Legacy CRT max X: 0
Legacy CRT max Y: 0
Legacy CRT max refresh: 85

there might some other issue, could you file a bug to bugs.freedesktop.org?

-- 
Open Source Technology Center, Intel ltd.

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