[Bug 282352] [NEW] crash under screenblank

Sun Oct 12 20:03:01 UTC 2008

Public bug reported:

Binary package hint: linux-image

My machine is crashing solidly (no ping, no caps lock) while under a
forced screen blank on Intrepid; this worked reliably on Hardy for many
months; however I should note that about a day after the intrepid
upgrade I added an external monitor - so it's difficult to say if that
contributed to it.  It's also been running fine while I've been using it
all week, and it seems fine under a normal screenlock (ctrl-alt-l) -
I've filed it under the kernel because it's a solid crash rather than
just desktop.

I have a launcher on my panel that does an:

   xset dpms force off

to blank the screens when I want to turn around and watch some TV; if I
press it and bring it out of blank within a minute or two it's fine.
However since I upgraded to Intrepid (about a week and a half ago) I've
found that it reliably crashes under blank after a sustained blank.  In
this case I hit blank at 7.15pm and a talker I was connected to saw me
disconnect at 7.35pm; I see a 'MARK' entry in the logs at 19:03 and
19:23 but that's the last thing I find until I forcibly power cycle it.
The numlock LED on the external ps2->USB adapter'd PS2 keyboard is still
on.  When I came back to it about 8.30pm it didn't ping, external net
connections had dropped and I couldn't get it to wake up with any keys.

It's a Toshiba Equium (laptop) A100-306 with PSU plugged in ; Intel
Core2 Duo with i945G graphics not running anything exotic - Gnome with
an X config that runs both internal and external display simultaneously.

Currently running on 2.6.27-6.
The machine has always given a few ACPI errors of the form:

Oct 11 20:18:30 davros kernel: [41474.880255] ACPI: Transitioning device [FAN0]  to D0
Oct 11 20:18:30 davros kernel: [41474.880266] ACPI: Unable to turn cooling device [ffff8800bee30e20] 'on'

but never shown any sign of heat problems - and as I say this crash only
seems to happen when completely idle.

lspci
------

00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03)
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 02)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 02)
00:1c.2 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 3 (rev 02)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 02)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 02)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02)
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA IDE Controller (rev 02)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 02)
05:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02)
07:06.0 CardBus bridge: Texas Instruments PCIxx12 Cardbus Controller
07:06.1 FireWire (IEEE 1394): Texas Instruments PCIxx12 OHCI Compliant IEEE 1394 Host Controller
07:06.2 Mass storage controller: Texas Instruments 5-in-1 Multimedia Card Reader (SD/MMC/MS/MS PRO/xD)
07:06.3 SD Host controller: Texas Instruments PCIxx12 SDA Standard Compliant SD Host Controller
07:08.0 Ethernet controller: Intel Corporation PRO/100 VE Network Connection (rev 02)

xorg.conf (hand crafted):

# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# Note that some configuration settings that could be done previously
# in this file, now are automatically configured by the server and settings
# here are ignored.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg

Section "Device"
	Identifier	"dev0"
	Driver          "intel"
	Busid           "PCI:0:2:0"
	Option "monitor-LVDS" "moninternal"
	Option "monitor-VGA" "monexternal"
EndSection

Section "Monitor"
	Identifier	"moninternal"
	Option          "Position" "0 1080"
	Option          "PreferredMode"  "1280x800"
EndSection

Section "Monitor"
	Identifier	"monexternal"
	HorizSync       30-70
	Vertrefresh     30-70
	Option         "Position" "0 0"
        ModeLine       "1920x1080" 138.407 1920 1984 2016 2096 1080 1082 1087 1111 +hsync -vsync
	Option         "PreferredMode"  "1920x1080"
EndSection

Section "Screen"
	Identifier	"scr0"
	Monitor		"mon0"
	Device		"dev0"
	SubSection "Display"
		Virtual	1920 1880
	EndSubSection
EndSection

** Affects: linux-meta (Ubuntu)
     Importance: Undecided
         Status: New

-- 
crash under screenblank
https://bugs.launchpad.net/bugs/282352
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