Peter Clifton wrote on Tuesday, January 13, 2009 11:45 AM: > 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.
This looks similar to http://bugs.freedesktop.org/show_bug.cgi?id=19431, interesting bug. Gordon _______________________________________________ xorg mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/xorg
