[Bug 514485] Re: kernel lockup when plugging in USB stick

[zoidberg]

Ok...
Installed Ubuntu 9.10 (i.e. with Gnome) on a 5GB partition I had.
No freeze so far.

Also did a few tests on Windows XP and no freezes.

Is it possible that this problem is caused by KDE?

Another thing I noticed was this bug message in dmesg:
=====
[   11.096177] EDAC amd64: This node reports that Memory ECC is currently disabled.
[   11.096181] EDAC amd64: bit 0x400000 in register F3x44 of the MISC_CONTROL device (0000:00:18.3) should be enabled
[   11.096183] EDAC amd64: WARNING: ECC is NOT currently enabled by the BIOS. Module will NOT be loaded.
[   11.096185]     Either Enable ECC in the BIOS, or use the 'ecc_enable_override' parameter.
[   11.096186]     Might be a BIOS bug, if BIOS says ECC is enabled
[   11.096187]     Use of the override can cause unknown side effects.
[   11.096212] amd64_edac: probe of 0000:00:18.2 failed with error -22
=====
Could it have anything to do with my problem?
I even got this message while running the Ubuntu 9.10 Live-CD!

I found no ECC (error-correcting code?) setting in the BIOS.

Related bug reports:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/471814
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/422536

Note: It turns out the Ubuntu kernel comes with soft-lockup detection enabled, so recompiling is unnecessary.
At least "make menuconfig" showed it as enabled in the source gotten through apt-get.
Still, if recompiling with certain changes or settings is necessary, I'm willing to do it.
I just have absolutely no idea what to change or test right now.


** Attachment added: "dmesg output after freeze and reboot"
   http://launchpadlibrarian.net/42407416/dmesg.log

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kernel lockup when plugging in USB stick
https://bugs.launchpad.net/bugs/514485
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