[Intel-gfx] Screen unusable for console until X starts (945GM)

[Rolf Eike Beer]

Daniel Vetter wrote:
> On Sat, Oct 20, 2012 at 08:18:31PM +0200, Rolf Eike Beer wrote:
> > Daniel Vetter wrote:
> > > On Sat, Oct 20, 2012 at 2:20 PM, Rolf Eike Beer <eike-kernel at sf-tec.de>
> > 
> > wrote:
> > > > I can switch the screen brightness during startup, but that only makes
> > > > the
> > > > black screen a dark grey screen, I still see no text.
> > > 
> > > Could be that we botch something with the enable sequence then. Can
> > > you try 3.7-rc1 please (or the latest drm-intel-fixes tree from
> > > http://cgit.freedesktop.org/~danvet/drm-intel)? The reworked modeset
> > > code is reportedly better at not frying lvds panels ...
> > 
> > Same behavior as before, dmesg attached.
> > 
> > $ rpm -qi kernel-vanilla-3.7.rc1.next.20121019-1.1.i686 | tail -n 7
> > The standard kernel - without any SUSE patches
> > 
> > 
> > Source Timestamp: 2012-10-19 18:37:40 +0200
> > GIT Revision: 375041b9f8fcf7c3f5890dea352c9f61f7695f0a
> > GIT Branch: linux-next
> > Distribution: Kernel:linux-next
> > 
> > Greetings,
> 
> I've misread your dmesg, there's actually nothing wrong with the backlight
> settings that the i915 driver does. One thing to figure out is which
> backlight controller actually controls your backlight. Can you check out
> all the exposed controls in /sys/class/backlight and experiment around
> which ones have an effect?
> 
> I'm pretty sure that it's the backlight and not a modeset gone wrong,
> since We don't do another modeset when X starts (it takes over the current
> setup).

lrwxrwxrwx 1 root root 0 Oct 20 20:10 acpi_video0 -> 
../../devices/pci0000:00/0000:00:02.0/backlight/acpi_video0
lrwxrwxrwx 1 root root 0 Oct 20 20:10 intel_backlight -> 
../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight

I've tried echo'ing something in the brightness file in there. 
actual_brightness changes to the value I've written in there, but I don't see 
any visual effect.

Eike
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 198 bytes
Desc: This is a digitally signed message part.
URL: <http://lists.freedesktop.org/archives/intel-gfx/attachments/20121020/6dde48ab/attachment.sig>