BUG: soft lockup detected on CPU#0! during vt switch between two X servers

[Markus Bertheau]

This is a 6.06 box fully up-to-date. Intel 845G onboard video, two X servers running, one with the X clients local, the other on a remote box running 6.10. VMWare was running.

I was switching from the 7th (local X) to the 8th (remote X) vt. Then the X on vt 7 died and the Kernel message appeared. The X on vt 8 continued to work. gdm opened a new login screen on vt9. I restarted gdm to be on vt 7 again.

markus@markus:~$ uname -a
Linux markus 2.6.15-28-386 #1 PREEMPT Thu Feb 1 15:51:56 UTC 2007 i686 GNU/Linux

Attaching dmesg and lspci output.

[Markus Bertheau (mbertheau)]

I have to add that what happened after this (or before maybe) is that the X on vt 7 crashed. X on vt 8 continued to work normally.

[Launchpad Janitor (janitor)]

Beginning with the Hardy Heron 8.04 development cycle, all open Ubuntu kernel bugs need to be reported against the "linux" kernel package. We are automatically migrating this linux-source-2.6.15 kernel bug to the new "linux" package. We appreciate your patience and understanding as we make this transition. Also, if you would be interested in testing the upcoming Intrepid Ibex 8.10 release, it is available at http://www.ubuntu.com/testing . Please let us know your results. Thanks!

[Leann Ogasawara (leannogasawara)]

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.

--or--

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 http://www.ubuntu.com/testing 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.

[fida (fida-aljounaidi)]

Hello

Can i try to install this new kernel version on ubuntu 8.04 server?

Thank you

[Jeremy Foshee (jeremyfoshee)]

This bug report was marked as Incomplete and has not had any updated comments for quite some time. As a result this bug is being closed. Please reopen if this is still an issue in the current Ubuntu release http://www.ubuntu.com/getubuntu/download . Also, please be sure to provide any requested information that may have been missing. To reopen the bug, click on the current status under the Status column and change the status back to "New". Thanks.

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