All filesystems change to read-only after a while with kernel 2.6.6-1.435

[Pete Pokrandt]

After upgrading to kernel version 2.6.6-1.435, I'm having an issue
where after the machine is up for several hours, all of a sudden all
of my filesystems (ext3) change to read-only. I tried a stock 2.6.7
kernel built with the config file for fedora-2 2.6.6-1.435 and have
the same results. The problem does not seem to occur using 
kernel 2.6.6-1.427, at least I haven't had it happen yet.

Unfortunately, since all the filesystems are read-only, I have
no debug info or any idea what exactly is happening, because
the system logger can't write to the system logs once the root fs
becomes read-only. Screensaver had kicked in too, so no useful
info on the monitor either, other than lots of failed journal
updates related to the fs being read-only.

Upon reboot, the fsck of the / filesystem always fails with messages 
about inodes being members of orphan nodes. Single user fsck fixes 
that and the subsequent reboot works fine.

Any ideas, or suggestions as to what I can do to get more info
on what is going on? Maybe logging to the console as well
as to /var/log/messages and turn off the screen saver, to get more
info about what happens?

I'm running on a single processor AMD athlon at 1.4 Ghz, 1 Gb RAM. 
Output from lspci is:

00:00.0 Host bridge: Advanced Micro Devices [AMD] AMD-760 [IGD4-1P] System Controller (rev 13)
00:01.0 PCI bridge: Advanced Micro Devices [AMD] AMD-760 [IGD4-1P] AGP Bridge
00:04.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 40)
00:04.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
00:04.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 16)
00:04.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 16)
00:04.4 Non-VGA unclassified device: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 40)
00:05.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 10)
00:0a.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 0c)
01:05.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400 AGP (rev 82)

Thanks,

Pete

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