screen goes blank after changing resolution

[doniks]

when i type
xrandr -s 1
the screen goes blank
i can close the laptop lid and make it go to sleep and then open it again and everything is ok. the inteded resolution is applied and i can continue to work.

this bug
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/258584
seems to be gnome related but im using kde (kubuntu 11.10):

this bug
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/324286
is maybe related but it has vanished in 2009 "This looks to be fixed in the latest update."

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: xorg 1:7.6+7ubuntu7
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
Date: Mon Oct 17 18:18:43 2011
InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcEnviron:
 LANGUAGE=
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)

[takilaci (holzmichl)]

I have the same problem.
I use freshly installed Kubuntu 11.10 32bit.
Video hardware is GMA 950 (i945G express chipset).

[doniks (kaabud-lp)]

I have a MacBook4,1 and my Xorg.0.log says:

intel(0): Integrated Graphics Chipset: Intel(R) 965GM
intel(0): Chipset: "965GM"

[doniks (kaabud-lp)]

it seems that the backlight gets turned off. i can use the "increase screen brightness" button on the keyboard to turn the screen back on. similarly via sysfs:

cd /sys/class/backlight/intel_backlight/
sudo chmod a+w brightness

xrandr -s 1 ; grep -H . *brightness ; sleep 3 ; cat max_brightness > brightness ; grep -H . *brightness
actual_brightness:0
brightness:0
max_brightness:494
actual_brightness:494
brightness:494
max_brightness:494

with this, the screen is black for the 3 seconds and then is turned back on. takilaci, does that also work for you?

[doniks (kaabud-lp)]

i cannot reproduce this problem on another computer with kubuntu oneiric and an nvidia card.

[ 21.592] (II) NVIDIA(0): NVIDIA GPU GeForce 7300 GS (G72) at PCI:1:0:0 (GPU-0)
[ 21.605] (--) NVIDIA(0): Memory: 524288 kBytes
[ 21.605] (--) NVIDIA(0): VideoBIOS: 05.72.22.76.00
[ 21.605] (II) NVIDIA(0): Detected PCI Express Link width: 16X
[ 21.605] (--) NVIDIA(0): Interlaced video modes are supported on this GPU
[ 21.605] (--) NVIDIA(0): Connected display device(s) on GeForce 7300 GS at PCI:1:0:0:
[ 21.605] (--) NVIDIA(0): BenQ G2220HD (DFP-0)
[ 21.605] (--) NVIDIA(0): BenQ G2220HD (DFP-0): 165.0 MHz maximum pixel clock
[ 21.605] (--) NVIDIA(0): BenQ G2220HD (DFP-0): Internal Single Link TMDS

so, ill put xserver-xorg-video-intel as affected instead of xorg-server

[doniks (kaabud-lp)]

i just reinstalled Oneiric on the macbook and now i cant reproduce this problem anymore

[doniks (kaabud-lp)]

not reproducible anymore -> invalid