Comment 4 for bug 756624
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| Bryce Harrington (bryce) wrote Re: [pineviewgm] black screen attaching external monitor (x86_64) | #4 |
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0e1f616
(Get the code!)
Hi Fabio,
I don't know what causes this bug, but have some ideas. Can you do the following three tests, which should hopefully narrow down how/where this is failing?
a. Boot into "Classic Desktop (No Effects)" and see if you can reproduce the issue. (If not, this might be just a max texture size issue.)
b. Install xdiagnose, and turn on Debugging Messages (the first checkbox). Reboot the system, reproduce the bug, and then run the command 'dmesg > dmesg.txt' and attach dmesg.txt to this bug report. (This will help give better diagnositcs.)
c. Find another external monitor of a different model, and see if the issue can be reproduced with that monitor as well. (If not, then this may be an EDID issue with the particular monitor.)
Also, a few general questions I would appreciate your answers on:
* You mentioned "gnome crashed" - how are you determining that it was gnome that crashed? (I'm suspecting that actually what you saw might be a kernel gpu lockup rather than a crash).
* It looks like you upgraded on March 21st from maverick. Is this correct? Did the external monitor work properly before the upgrade? Did it ever work after the upgrade prior to when you filed this report? (I.e., is this a recent regression or a regression between maverick->natty?)