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Old 10-11-07, 11:30 AM   #1
soft-toiletpaper user
Join Date: Oct 2007
Posts: 2
Default standard fbcon + nvidia (binary) computer hang

Problem: Twinvideo mode, fbcon console rotation, xrandr -o left (X pivot), in X => Hangs/freezes system completely on x86 kernel and x86_64 kernel.

How to reproduce: vanilla kernel (linux, 2.6.20-22), "fbcon=rotate:3" passed to kernel (console rotation) , pivot screen with xrandr "xrandr -o left", use nvidia binaries (also latest) for x86 and x86_64, start X session.

Either by going idle or in active use. Composite expediates time-to-hang. System will always hang at some point, guaranteed. Some mouse control for 5 seconds (no button response), followed by artefacts. Then complete system hang.

Hardware: G6600, 256mb. Problem not to be blamed on hardware failure. I traced the problem back to that "fbcon: rotate=3". If turned off => System stable (As it should be).

Anyone know how/have the time to diagnose this further?

I have turned my screens to the side, because this maximizes my use of the screens, since I'm a programmer.

I haven't gotten time to produce a kernel dump yet. But I'm sure this can be reproduced by someone else as well.

Thanks in advance.

Update: I thought, it was the pivot parameter, but the system still managed to crash nvidia and freeze.
Update: currently testing kernel 2.6.23, checking if there's any change.
Update: testing vanilla 2.6.23 seems to be stable, even turned on composite
Update: now patched with rt1 and tuxonice, testing stability

Last edited by fbcon; 10-13-07 at 04:55 AM.
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Old 12-05-07, 02:07 PM   #2
soft-toiletpaper user
Join Date: Oct 2007
Posts: 2
Default Re: standard fbcon + nvidia (binary) computer hang

Okay, a month later I still have the same problem.
I have ruled out the operating system.

Now it's down to driver, or the physical mobo or the physical card.

Thinking of getting an ati.
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