kernel BUG at /build/buildd/linux-2.6.24/debian/build/custom-source-rt/kernel/rtmutex.c:692!; EIP is at rt_spin_lock_slowlock+0x127/0x170

Bug #234038 reported by Dmitriy Geels on 2008-05-22
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)

Bug Description

I got this crash twice since updating kernel to 2.6.24-17.
First time crash was really sudden, second time -- compiz crashed, then when I tried to run apport-cli, it crashed and left some backtrace (lost already), then, after about one minute, got kernel crash.

Crash looks like: screen flickers few times, then become blank/with some garbage. System doesn't respond to keyboard. Didn't try to connect via ssh, but I don't think, it's possible.

After reboot I looked into logs: there were only few lines, telling about BUG in rtmutex.c (see attached crash.log).

Also including almost all info, specified in Kernel Team Bug Policies.

Dmitriy Geels (dmig) wrote :
Dmitriy Geels (dmig) wrote :
Dmitriy Geels (dmig) wrote :
Dmitriy Geels (dmig) wrote :
Dmitriy Geels (dmig) wrote :
leifdk (leiflarsen1978) on 2008-05-23
Changed in linux:
status: New → Confirmed
Dmitriy Geels (dmig) wrote :

Just caught this crash with 2.6.24-18-rt
Now much more debug info

Dmitriy Geels (dmig) wrote :

Just caught a crash with 2.6.24-19-rt. Now without any information in logs about this crash (may be just lost in FS?).

Dmitriy Geels (dmig) wrote :

Again crash on 2.6.24-19-rt, now with death log.

The Ubuntu Kernel Team is planning to move to the 2.6.27 kernel for the upcoming Intrepid Ibex 8.10 release. As a result, the kernel team would appreciate it if you could please test this newer 2.6.27 Ubuntu kernel. There are one of two ways you should be able to test:

1) If you are comfortable installing packages on your own, the linux-image-2.6.27-* package is currently available for you to install and test.


2) The upcoming Alpha5 for Intrepid Ibex 8.10 will contain this newer 2.6.27 Ubuntu kernel. Alpha5 is set to be released Thursday Sept 4. Please watch for Alpha5 to be announced. You should then be able to test via a LiveCD.

Please let us know immediately if this newer 2.6.27 kernel resolves the bug reported here or if the issue remains. More importantly, please open a new bug report for each new bug/regression introduced by the 2.6.27 kernel and tag the bug report with 'linux-2.6.27'. Also, please specifically note if the issue does or does not appear in the 2.6.26 kernel. Thanks again, we really appreicate your help and feedback.

Dmitriy Geels (dmig) wrote :

Leann, I'd like to install kernel 2.6.27 package for Hardy. Is it available?

Hi dmig,

The 2.6.27 kernel is available in the Intrepid repository. Unfortunately I don't think the -rt flavor is available yet for testing.

Julian G. (julian-galbraith) wrote :

Hi. I encountered a similar situation.
The 2.6.27-3-rt kernel randomly freezes. The generic is O.K.
The system is a bone stock Dell Dimension 5150.

Need any information?
Ubuntu 8.10 32bit

Dmitriy Geels (dmig) wrote :

I'll tell you how to get freeze info: after reboot look into system logs (gnome-system-log is good for this), find place where system was running before freeze, there should be some last words of kernel.

Julian G. (julian-galbraith) wrote :

The system completely locks up generally within 15 minutes while using the rt kernel, screen, keyboard, mouse. I dont see any information in the logs that could assist.
I am attaching everything I have for the past few days.
Some of the logs are for the generic kernel which appears to be operating flawlessly.

My first assumption after doing a bit of reading is that it is a bug related to a combination of the rt kernel and the intel 945 xorg video driver.
00:02.1 Display controller: Intel Corporation 82945G/GZ Integrated Graphics Controller (rev 02)

I will test using the vesa driver and the rt kernel when I get a chance and see if the bug reproduces itself still.

Dmitriy Geels, thank you for reporting this and helping make Ubuntu better. Hardy desktop reached EOL on May 12, 2011.
Please see this document for currently supported Ubuntu releases:

We were wondering if this is still an issue on a supported release? If so, can you try with the latest development release of Ubuntu? ISO CD images are available from .

If it remains an issue, could you run the following command in a supported release from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report.

apport-collect -p linux <replace-with-bug-number>

Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

summary: - 2.6.24-*-rt: sudden kernel crash in rtmutex.c
+ kernel BUG at /build/buildd/linux-2.6.24/debian/build/custom-source-
+ rt/kernel/rtmutex.c:692!; EIP is at rt_spin_lock_slowlock+0x127/0x170
tags: added: hardy needs-upstream-testing
Changed in linux (Ubuntu):
status: Confirmed → Incomplete
Launchpad Janitor (janitor) wrote :

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]

Changed in linux (Ubuntu):
status: Incomplete → Expired
To post a comment you must log in.
This report contains Public information  Edit
Everyone can see this information.

Other bug subscribers