On Tue, 2009-01-13 at 01:55 +0000, Peter Clifton wrote: > Testing git HEAD intel drivers, also recent Xorg: > > > After the problem with miss-detected TV-out, I killed Xorg with a Ctrl > +Alt+Backspace (I've got zapping re-enabled in my xorg.conf), and the > outputs detected properly, with no TV output detected as being > connected. > > The performance was very slow, however, and with the characteristic > "jiggle" / jittering of the mouse cursor position which I've noticed on > both my Intel based machines during output detection. > > Trying xrandr, adjusting brightness, had no effect. A couple of VT > switches to VT1 and back to Xorg finally stopped the detection loop, > although during that process, one of the the switches to VT1 left me > with a corrupted console. (Possibly scanning out from the wrong part of > the frame-buffer, perhaps with the wrong sync settings?). > > I've attached the log. It does show a page-table problem with the last > VT switch.
I managed to re-trigger this bug by pulling the laptop's AC power adaptor out, and plugging it back in again. I suspect either an ACPI event, or something inside HP's SMM BIOS code triggered it. My old HP nc 6320 didn't properly respect _DOS bit 4, so would always fiddle with the graphics hardware when you plugged / unplugged the AC adaptor. I've not dug deeply into this one, so I'm not quite blaming the BIOS yet, however it is looking somewhat guilty. > _______________________________________________ > xorg mailing list > [email protected] > http://lists.freedesktop.org/mailman/listinfo/xorg -- Peter Clifton Electrical Engineering Division, Engineering Department, University of Cambridge, 9, JJ Thomson Avenue, Cambridge CB3 0FA Tel: +44 (0)7729 980173 - (No signal in the lab!) _______________________________________________ xorg mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/xorg
