Take the 2-minute tour ×
Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems.. It's 100% free, no registration required.

I have 2 monitors which can rotate physically. They are working fine right now as non-mirrored, dual monitors.

I went to System -> Preference -> Monitors and tried to rotate the screens. As soon as I click Apply, I appear at the log in screen as if I just logged out.

Does anybody know what might be going on?

Here are some lines that might be relevant in /var/log/Xorg.0.log.

(--) PCI:*(0:1:0:0) 1002:9552:1458:21ac ATI Technologies Inc M92 LP [Mobility Radeon HD 4300 Series] rev 0, Mem @ 0xd0000000/268435456, 0xfe9f0000/65536, I/O @ 0x0000c000/256, BIOS @ 0x????????/131072
...
(--) RADEON(0): Chipset: "ATI Mobility Radeon 4300 Series" (ChipID = 0x9552)
...
(II) RADEON(0): RandR 1.2 enabled, ignore the following RandR disabled message.
(--) RandR disabled

There's also the gdm3 service running if that helps.

share|improve this question
1  
What is the video card manufacturer and what drivers are you using? –  Caleb Aug 8 '11 at 19:50

1 Answer 1

I found this page, http://lists.debian.org/debian-x/2011/03/msg00695.html, which is essentially the same issue as mine. Something was wrong with the firmware. I needed to install firmware-linux-nonfree and reboot.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.