Hi ml, Does this also occur in Ubuntu Precise (12.04)?
If you don't want to install Ubuntu Precise, it should be sufficient to boot a Live USB session, configure the monitors, and see if it is working properly now. You can get the current Live USB desktop image at http://cdimage.ubuntu.com/daily-live/current/ and create a USB boot drive using usb-creator. I take it that with the monitor directly connected, without the KVM, that it works fine? This bug sounds familiar, I think we had one where the KVM was blocking some/all of the EDID in such a way that the kernel kept re-probing to determine the resolution. Something like that. But your log files don't give any indication whether or not that's what's going on here. In addition to testing on precise, one other thing that might help reveal some clues would be to turn on drm debugging. Run `sudo xdiagnose`, mark the first checkbox, Apply, and reboot. Now after reproducing the issue collect the output of `dmesg`, which will have more detailed debugging info for us. If my theory is correct, there should be a repeating output in there relating to monitor probing, with the same periodicity as you're noting with the effect. ** Changed in: xserver-xorg-video-intel (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/873718 Title: External monitor via KVM switch flashes all the time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/873718/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
