The same problem on Radeon HD6310 (E-300 APU) on Lenovo Thinkpad X121e. Using Ubuntu 12.10. Display is off since the point after grub.
vt_handoff workaround did help. However, display still turns off, but then returns in less than a second, so that I can see plymouth. BTW, I have the same problem on another old box, with Nvidia Geforce4. It also turns monitor off, and turns it on only when lightdm starts. And vt_handoff workaround does help, the same way as with Thinkpad. CRT display flickers, goes off for about a second, and then turns on and plymouth comes up. Just as a side note: switching to other tty (e.g. pressing ctrl+alt+1) turns display on (without workaround). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1057532 Title: Monitor goes black ("no signal") after Grub, comes back to life when X starts To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1057532/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
