[Intel-gfx] Intel Linux display driver sending incompatible signal to one monitor.

[Paul Menzel]

Am Donnerstag, den 06.12.2012, 19:03 -0800 schrieb Freddie F. Haddad:
> Gentoo Linux
> - kernel 3.6.8
> - xf86-video-intel 2.20.15
> - xorg-server: 1.13.0-r1

Is your problem a regression?

> grub.conf
> kernel /boot/gentoo_3.6.8 root=/dev/sda3 video=1024x768-24 at 75 quiet splash
> 
> .xinitrc
> xrandr --output HDMI1 --mode 1600x1200 --rate 60 --output HDMI3 --mode
> 1600x1200 --rate 60 --right-of HDMI1
> 
> Booting the system:
> Generally the displays are fine, however, sometimes (and it appears to
> be completely random) the left monitor will receive a video signal that
> is out of range. Briefly, the monitor will display a scrambled image
> followed by the monitor's on-screen display reporting the signal is out
> of range and then putting the monitor to sleep.
> 
> Starting X via startx:
> When X starts, the same scenario as described above occurs.
> 
> If I shutdown the x server and return to the console, the monitor that
> isn't displaying anything will come back on and be fine. Then if I start
> X again, it usually displays everything correctly.
> 
> Both monitors (Dell Ultrasharp 2007FP) were purchased at the same time
> and are identical. Also, I have tried various configurations with xrandr
> and the kernel line in grub.conf. For example, I tried removing all
> kernel parameters as well as reducing xrandr the minimum options
> (removing mode and rate) without success.

I guess without log files the developers will not be able to help you.
For example you missed what hardware you are using. Please read the page
»How to file a good bug report« [1] for what is needed.


Thanks,

Paul


[1] http://intellinuxgraphics.org/how_to_report_bug.html
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