Bug 10664

Created attachment 9640 [details]
My Xorg conf

Created attachment 9641 [details]
Xorg log, server hangs at end of file

I think I'm seeing the same problem on FC7 Test with the following packages

xorg-x11-server-Xorg-1.3.0.0-5.fc7
xorg-x11-drv-i810-2.0.0-3.fc7

Also an 852GM/855GM system (Acer TravelMate 382TMi). The VBIOS on this system is pretty bad, so this is the first driver I've tried that allows me to run dual-screen and resolutions other than the native 1024x768.

Many times xrandr mode changes after logging on work fine, other times the computer freezes. I haven't tried pinging it from another system after the freeze, but virtual terminals can no longer be switched, no other keyboard input has any effect, and the only way I can reboot is by holding the power button down for 4 seconds, so I think it's a complete freeze. Log files don't provide me with any clues, either.

Identical symptoms on Thinkpad X40.
Also occasionally happens on suspend to disk. (which switches to console)
Gentoo 2.6.20-suspend2
xorg-server-1.3.0.0
intel-2.0.0

Just happened again; ping fails.

This only seems to happen when the crtc for my laptop's built-in display (LVDS) is modified. If I use xrandr to only update the position of the external display (VGA), it never hangs.

From the startup (cloned) setup, running:

xrandr --output VGA --below LVDS
NEVER HANGS
(--dryrun):
screen 0: 1600x1968 366x450 mm 110.84dpi
crtc 0:    1600x1200   60.0 +0+768 "VGA"

xrandr --output VGA --above LVDS
HANGS OFTEN (maybe 60-80%, no obvious environment differences)
(--dryrun):
screen 0: 1600x1968 366x450 mm 110.84dpi
crtc 0:    1600x1200   60.0 +0+0 "VGA"
crtc 1:     1024x768   47.1 +0+1200 "LVDS"

I can't confirm comment 6 on my machine. This script takes less than a minute to hang; though perhaps it happens even faster with different geometries:

while :
do
  xrandr --output VGA --below LVDS --mode 1280x1024
  sleep 3
  xrandr --output VGA --off
  sleep 3
done

The LVDS native resolution is 1024x768. I tried using that resolution on the VGA as well, and that, too, would produce a full freeze. What happens is that the screen goes black, and nothing responds any more. I wish I could produce some debug output, but nothing ends up anywhere I could locate it at.

Running the commands from comment #6 DOES hang after ~5 cycles, which is apparently more samples than I used to reach my "NEVER HANGS" conclusion in comment #5 ...

I also tried:
(unplug VGA)
xrandr --auto
(plug VGA)
xrandr --auto
(repeat)

Which just enables/disables clone mode (changing resolution 1024<->1600).
This is my current normal use case (2-4 times daily, with suspends-to-disk between) which has not broken before, that I've noticed, but did fail after ~10 contiguous cycles.

Keith Packard's commit from yesterday fixes this problem: http://gitweb.freedesktop.org/?p=xorg/driver/xf86-video-intel.git;a=commit;h=fbbb41bc5e03478cb46ee8f64ef68b23ff3fc14b

heh, just got into the office and was going to report the same :) it works properly on my IBM X40 with i855GM.

Seems fixed here too, thanks!