Red Hat Bugzilla – Bug 869824
Kernel 3.6 upgrade breaks dual-head support with Intel Graphics
Last modified: 2013-07-31 13:57:42 EDT
Created attachment 633051 [details]
Description of problem:
I have two monitors attached to my single graphics card, one via VGA and one via DVI. This setup works fine with kernel 3.5 (3.5.6-1.fc17.x86_64), but after upgrading to 3.6.x, the DVI-attached screen goes blank as soon as the kernel loads (i.e. GRUB shows on it, but not the bootsplash or X). Booting to 3.5 continues to work as expected. Card is an integrated Intel 4 Series. It has an HDMI port, but not in use and I haven't tested it.
Version-Release number of selected component (if applicable):
3.6.x (3.6.1-1.fc17.x86_64 and 3.6.1-1.fc17.x86_64)
Steps to Reproduce:
1. Upgrade to 3.6.x kernel
Monitor attached to DVI port is blank
Both monitors displaying correct images
Will attach logs
Created attachment 633054 [details]
dmesg and Xorg logs for both working and broken kernel versions
I just realized that the Xorg logs say that the second monitor is connected to to HDMI1, even though it's actually connected to the DVI port. And both monitors are connected exactly the same way when using 3.6, even though it says only one is connected.
Same symptoms in kernel 3.6.3-1.fc17.x86_64.
Are you still seeing this with 3.7.9 or 3.8.2 in updates-testing?
Same issue here, I'm in:
Linux localhost.localdomain 3.8.2-206.fc18.x86_64 #1 SMP Fri Mar 8 15:03:34 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
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