|04-11-05, 02:41 PM||#1|
Join Date: Apr 2005
solved: Pavilion zv5000, Linux 2.6.11 x86_64, NV rel. 7174: black/out of synch screen
This solution worked with the 7174 release, but it solved a problem I had encountered with 6629, 7167 and 7174, so it might work for all of them.
The problem: out of synch screen when I tried to start the server. In layman terms, the screen went black or slowly switched between a few shades of dark grey. After killing the server (Ctrl + Alt +bkspc), the framebuffer was screwed up and it looked like an image that was de-interlaced both horizontally and vertically.
I read somewhere in these forums that the problem was that the driver (kernel module if you will) read a wrong EDID (Extended Display Identification Data). It seems that the LCD in this laptop provides incorrect EDID, so the module calculates the wrong timelines, which leads to the out of synch screen.
The solution: set the module option NVreg_SoftEDIDs=0.
In SuSE 9.1 (and later I assume), this can be done by appending the following line to the file /etc/modprobe.conf.local
options nvidia NVreg_Mobile=0 NVreg_SoftEDIDs=0
I tested this solution against the 2.6.11-4 SuSE kernel (i.e. not the stock kernel !) and the driver worked flawlessly.
Summing it up: it seems the problem is caused by the monitor, which provides incorrect identification data. As taken from the module's source code documentation (os-registry.c):