Bug 60071

Well. I don't know where I should sort this report in.

But here is the description what happens if I upgrade from 3.9.6 to 3.9.7:

It seems that the X-server failed to start. Downgrading the kernel resolved the problem.

What I'm seeing:
I did further investigate the problem, and curiously no error was printed, if I started an X-server by hand. So I discovered everything works unless the fact I can't switch to the Server. If I try to, the screen freezes and switching back to a tty takes it time.


What's happening:
The Kernel doesn't recognize with 3.9.7, that on my graphic card (nv50 type (NVIDIA 8800 GTS)) only one connector is used. xRandr aligns both ports. I can work on tty, but can't switch to an x-server


Some logs:
With Linux 3.9.6:
xrandr message:
xRandr: Found crtc's: 2
xRandr: Linking output DVI-I-1 with crtc 0


Output of xrandr --current:
Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 8192 x 8192
DVI-I-1 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 473mm x 296mm
1680x1050 59.9*+
1400x1050 74.9
1280x1024 75.0
1440x900 75.0 59.9
1152x864 75.0
1024x768 75.1 70.1 60.0
832x624 74.6
800x600 72.2 75.0 60.3 56.2
640x480 72.8 75.0 66.7 60.0
720x400 70.1
DVI-I-2 disconnected (normal left inverted right x axis y axis)


Logs with Linux 3.9.7:
xrandr message:
xRandr: Found crtc's: 2
xRandr: Linking output DVI-I-1 with crtc 0
xRandr: Linking output DVI-I-2 with crtc 1


Output of xrandr --current:
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 8192 x 8192
DVI-I-1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 473mm x 296mm
1680x1050 59.9 +
1400x1050 74.9
1280x1024 75.0
1440x900 75.0 59.9
1152x864 75.0
1024x768 75.1 70.1 60.0*
832x624 74.6
800x600 72.2 75.0 60.3 56.2
640x480 72.8 75.0 66.7 60.0
720x400 70.1
DVI-I-2 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1024x768 60.0*
800x600 60.3 56.2
848x480 60.0
640x480 59.9


Possible source for the problem:
From the 3.9.7 changelog https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.9.7

commit aed4802d2a0d2f6c7179a2c03e184860741788c0
Author: Ben Skeggs <bskeggs@redhat.com>
Date: Mon Jun 3 16:40:14 2013 +1000

drm/nv50/kms: use dac loadval from vbios, where it's available

commit d40ee48acde16894fb3b241d7e896d5fa84e0f10 upstream.

Regression from merging the old nv50/nvd9 code together, and may be
needed to fully fix fdo#64904.

The value is ignored completely by the hardware starting from nva3.

Reported-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

commit b242745947ed7562ad91dad9e9fde1a92e40d666
Author: Ben Skeggs <bskeggs@redhat.com>
Date: Mon Jun 3 16:07:06 2013 +1000

drm/nv50/disp: force dac power state during load detect

commit ea9197cc323839ef3d5280c0453b2c622caa6bc7 upstream.

fdo#64904

Reported-by: Gerhard Bräunlich <wippbox@gmx.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>