Bug#371857: i810 doesn't restore console properly with vga=ext.

[Matthew Woodcraft <matthew@woodcraft.me.uk>]

Brice Goglin wrote:
> Is there a chance you try xserver-xorg-core 1.3 (in testing) and
> xserver-xorg-video-intel 2.0 (in experimental)? The latter is a major
> rework of the driver for intel graphic chipsets.

I tried with the following combination (from today's sid):

xserver-xorg-core 2:1.3.0.0.dfsg-6
xserver-xorg-video-intel 2:2.0.0-1

This crashes if I switch to the console and then back to X (I wasn't using
vga=ext in this case).

At first, after I switched back, it was working partially (the window
decorations didn't draw, but I could type into a terminal). Then it became
unresponsive except for the mouse pointer. ctrl-alt-backspace wouldn't kill
it, but alt-sysrq did.

Xorg.log shows this from the switch to console and back:

(II) AIGLX: Suspending AIGLX clients for VT switch
(II) intel(0): xf86UnbindGARTMemory: unbind key 0
(II) intel(0): xf86UnbindGARTMemory: unbind key 1
(II) intel(0): xf86UnbindGARTMemory: unbind key 2
(II) intel(0): xf86UnbindGARTMemory: unbind key 3
(II) intel(0): xf86UnbindGARTMemory: unbind key 4
(II) intel(0): xf86UnbindGARTMemory: unbind key 5
(II) intel(0): xf86UnbindGARTMemory: unbind key 6
(II) intel(0): xf86UnbindGARTMemory: unbind key 7
(II) intel(0): xf86UnbindGARTMemory: unbind key 8
(WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory)
(II) No APM support in BIOS or kernel
(II) AIGLX: Resuming AIGLX clients after VT switch
(II) intel(0): xf86BindGARTMemory: bind key 0 at 0x007bf000 (pgoffset 1983)
(II) intel(0): xf86BindGARTMemory: bind key 1 at 0x007c0000 (pgoffset 1984)
(II) intel(0): xf86BindGARTMemory: bind key 2 at 0x007c4000 (pgoffset 1988)
(II) intel(0): xf86BindGARTMemory: bind key 3 at 0x007c5000 (pgoffset 1989)
(II) intel(0): xf86BindGARTMemory: bind key 4 at 0x007c9000 (pgoffset 1993)
(II) intel(0): xf86BindGARTMemory: bind key 5 at 0x007d0000 (pgoffset 2000)
(II) intel(0): xf86BindGARTMemory: bind key 6 at 0x05000000 (pgoffset 20480)
(II) intel(0): xf86BindGARTMemory: bind key 7 at 0x06000000 (pgoffset 24576)
(II) intel(0): xf86BindGARTMemory: bind key 8 at 0x09000000 (pgoffset 36864)
(II) intel(0): Output configuration:
(II) intel(0):   Pipe A is on
(II) intel(0):   Display plane A is now enabled and connected to pipe A.
(II) intel(0):   Pipe B is off
(II) intel(0):   Display plane B is now disabled and connected to pipe B.
(II) intel(0):   Output VGA is connected to pipe A
(II) intel(0): [drm] dma control initialized, using IRQ 21
(II) Configured Mouse: ps2EnableDataReporting: succeeded

I'll try with the version from experimental next.

-M-