Created attachment 416019 [details]
Xorg log for failure with kernel 2.6.32
Description of problem:
After upgrading F12 from a 2.6.31 kernel to 2.6.32 and rebooting the display went blank. Serial console and remote access worked. This problem also occurs with F13 and with 32-bit as well as 64.
The Xorg logs show:
(EE) intel(0): No modes.
(II) UnloadModule: "intel"
(EE) Screen(s) found, but none have a usable configuration.
Fatal server error:
no screens found
The problem can be circumvented by specifying nomodeset for the kernel in grub.conf.
The problem only occurs when a Trendmicro TK-407 Keyboard/Video switch is connected between the DVI port and the analog display (a Samsung SyncMaster 955DF).
I am not sure what changed to break the xorg driver going from 2.6.31 to 2.6.31, I've had the KVM for a year now and no problems with it and Fedora. This was an extremely painful problem and took me many hours over 2 weeks to figure out. There seem to be a few other folks who have had similar problems, although I can't be positive. Hope you can come up with some way of fixing it. Let me know if you need any more information to diagnose the problem.
Version-Release number of selected component (if applicable):
xorg-x11-drv-intel.x86_64 2.9.1-1.fc12 - same version for working and non-working scenarios.
Steps to Reproduce:
1. display connected to TK-407, TK-407 connected to DVI port.
2. boot F12 (or F13) with kernel 2.6.32.
Blank display (display powers down).
successful boot as with kernel version 2.6.31.
I've attached working and non-working Xorg logs. It is easy to reproduce; let me know if anything else is needed.
Created attachment 416021 [details]
xorg log for normal operation with 2.6.31 kernel
Thanks for the bug report. We have reviewed the information you have provided above, and there is some additional information we require that will be helpful in our diagnosis of this issue.
Please add drm.debug=0x04 to the kernel command line, restart computer, and attach
* your X server config file (/etc/X11/xorg.conf, if available),
* output of the dmesg command, and
* system log (/var/log/messages)
to the bug report as individual uncompressed file attachments using the bugzilla file attachment link above.
We will review this issue again once you've had a chance to attach this information.
Thanks in advance.
I tried to reproduce the problem as you requested, bug unfortunately my display failed completely (i.e. it won't work with any system linux or otherwise). Hopefully it was the display that caused the problem with linux, and not linux causing my display to fail.
I've bought a new display and I no longer see this problem. You can close this bug report out if you want.
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