[Bug 596257] [NEW] MAJOR CRASH POSSIBLE: sysrq remains active with 2.6.35

[Nicolò Chieffo]

Public bug reported:

There's a key combination which triggers a strange sysrq mode (which I think is not wanted).
Every (known) key you'll press ends up in a sysrq call, so WARNING when you test this (especially don't press 'c' or 'b', but also other keys might have a bad result).

Do these things:
0) tail -f /var/log/messages
1) ALT-F2
2) SysRq key (als prntscr has the same result)
Now you're stuck in sysrq: hit 's' and see the "emergency sync" message
To end this mode press ALT-F2 followed by 's' until you see the an 's' printed.

This bug is also in linux-2.6.35-rc3 mainline, but not in 2.6.34
mainline.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-4-generic 2.6.35-4.5
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-4.5-generic 2.6.35-rc3
Uname: Linux 2.6.35-4-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 2/2
   Subdevice #0: subdevice #0
   Subdevice #1: subdevice #1
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  yelo3      1501 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf6adc000 irq 47'
   Mixer name	: 'Intel Cantiga HDMI'
   Components	: 'HDA:111d76b2,10280233,00100302 HDA:80862802,80860101,00100000'
   Controls      : 24
   Simple ctrls  : 15
Date: Sat Jun 19 14:45:58 2010
HibernationDevice: RESUME=/dev/sda6
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MachineType: Dell Inc. Latitude E6400
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-4-generic root=UUID=c65f05e4-8a87-4923-89ff-929c3811ba3c ro quiet splash
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=it_IT.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.36
SourcePackage: linux
dmi.bios.date: 12/21/2009
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A20
dmi.board.name: 0RX493
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA20:bd12/21/2009:svnDellInc.:pnLatitudeE6400:pvr:rvnDellInc.:rn0RX493:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Latitude E6400
dmi.sys.vendor: Dell Inc.

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


** Tags: amd64 apport-bug maverick needs-upstream-testing regression-potential

-- 
MAJOR CRASH POSSIBLE: sysrq remains active with 2.6.35
https://bugs.launchpad.net/bugs/596257
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