https://bugs.freedesktop.org/show_bug.cgi?id=42373
--- Comment #40 from Kunal kunal.gangakhedkar@gmail.com --- (In reply to comment #37)
(In reply to comment #36)
(In reply to comment #35)
Did you tested 3.7 kernel ? Bunch of patch went in some might help your case.
No, not yet. Will build and test a 3.7-rc1 based kernel and report back.
Thanks, Kunal
OK, didn't get time to try 3.7-rc1. So, instead, installed 3.7-rc5 based Ubuntu kernel from: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.7-rc5-raring/
(specifically, following files: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.7-rc5-raring/linux-headers- 3.7.0-030700rc5-generic_3.7.0-030700rc5.201211110835_amd64.deb
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.7-rc5-raring/linux-headers- 3.7.0-030700rc5_3.7.0-030700rc5.201211110835_all.deb
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.7-rc5-raring/linux-image-3. 7.0-030700rc5-generic_3.7.0-030700rc5.201211110835_amd64.deb
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.7-rc5-raring/linux-image- extra-3.7.0-030700rc5-generic_3.7.0-030700rc5.201211110835_amd64.deb )
With this, situation is no better. In fact, with this kernel, I cannot even switch to a tty to restart X - which works happily on my current 3.2.0-32-generic (package: "linux-image-3.2.0-32-generic" version: "3.2.0-32.51").
There is no significant message logged in the syslog with 3.7-rc5 which can point to a problem. Attaching the dmesg output and Xorg log anyways.
Thanks, Kunal
One more point to note: Whenever I try to reboot from 3.7-rc5 into 3.2.0-32, switch-to-tty + restart-x routine doesn't work even with the previously working setup. It exhibits the same issue as 3.7-rc5.
Any clue why so? Something to do with VRAM registers? Just guessing..
Thanks, Kunal