Red Hat Bugzilla – Bug 102755
usb-core module + RAID0 (Adaptect 2940W aic7xxx) hangs sytem
Last modified: 2007-04-18 12:57:00 EDT
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Description of problem:
When usb-core is compiled as a module, system locks sporadically - no console
access, cannot ssh, etc. If left alone, it will come back after some time (up
to an hour). (See attached /var/log/messages.)
If I compile a custom kernel, and make usb support part of the kernel, instead
of a module, I never experience this issue.
OS is installed on 1 SCSI disk
Using RAID0 array with 8 disks for file server partition
I think raid0 is significant.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Boot stock kernel
2. Perform some I/O instensive operation (extract kernel source)
3. When machine locks, do not reboot it. Leave it alone.
Created attachment 93790 [details]
Created attachment 93791 [details]
This /var/log/messages excerpt shows the system was locked from 15:57 until
Lots of SCSI debug info
What does happen if you press NumLock, does the LED switch on/off?
Poking requestor with a sharp stick and NEEDINFO-ing.
Sorry for never following up on this defect... When I stated above
"If I compile a custom kernel, and make usb support part of the
kernel, instead of a module, I never experience this issue," I was
wrong. The issue still happened (just took a few days).
I ended up putting the SCSI card and disk array in a different PC
(also an HP Kayak, but a newer model). The problem went away after that.
So, I can no longer reproduce the issue, or do any more tests. The
problem was either a hardware compatibility issue, or perhaps a bad
motherboard, CPU, RAM, or other hardware.
This bug can be closed.