Fedora 14 completely unusable; probably b/c kernel update

[demetris]

My main systems runs Fedora 14 x64 with the latest updates (I can't check anymore, but I believe it has the .13.91 x64 kernel). Since this afternoon it became unsuable. First, Opera Browser crashed and the crash report app of the browser showed up. Clicking one of the options there resulted to X crash, if I understood what really went on. No input, mouse or kb, I couldn't go to tty etc. I had to do a hard reset. Next boot proceeded normally up to the point that GNOME desktop is fully loaded. ABRT began reporting numerous kernel oops.
Rebooted again (noticed that init.d fails, so hard reset again) and tried past two kernel versions, same results.
Yum crashes and so does everything. I tried to revert all recent updates with yum history, but yum crashed.

Last update was May 22, and it updated kmod-nvidia.

Any ideas? I am lost.

---------- Post added 25th May 2011 at 12:19 AM ---------- Previous post was 24th May 2011 at 10:42 PM ----------

Hopefully I'll manage to post this before it crashes again

uname -a
Linux innovator 2.6.35.13-91.fc14.x86_64 #1 SMP Tue May 3 13:23:06 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

initial crash
Package: kernel
Latest Crash: Τρι 24 Μάι 2011 07:35:25 μμ
Command: not_applicable
Reason: [247097.130320] BUG: Bad page map in process Xorg pte:800000404df77067 pmd:b43d9067
Comment: before the reboot Opera 11.11 had crashed and it's own bug report tool came up. Clicking the "do not report this error now" option probably crashed X, because the screen went black and no input was possible (no mouse or keybord, so I couldn't go to tty either. Had to do a hard reset)
Bug Reports: Kernel oops report was uploaded


One of the numerous crashes
Package: kernel
Latest Crash: Τρι 24 Μάι 2011 09:19:56 μμ
Command: not_applicable
Reason: BUG: Bad page map in process gnome-system-mo pte:80000041274d6025 pmd:a65c1067
Comment: None
Bug Reports:

another
Package: kernel
Latest Crash: Τρι 24 Μάι 2011 08:53:55 μμ
Command: not_applicable
Reason: kernel BUG at fs/buffer.c:3346!
Comment: just logged in to GNOME
Bug Reports: Kernel oops report was uploaded

--
Package: yum-3.2.28-6.fc14
Latest Crash: Τρι 24 Μάι 2011 09:18:53 μμ
Command: /usr/bin/python /usr/bin/yum history
Reason: misc.py:33:<module>:ValueError: bad marshal data (string ref out of range)
Comment: None
Bug Reports:
---
Package: kernel
Latest Crash: Τρι 24 Μάι 2011 10:09:30 μμ
Command: not_applicable
Reason: BUG: Bad page map in process sshd pte:4000000000 pmd:a6759067
Comment: None
Bug Reports:

[nirik]

Hold down shift while booting, you should get to a grub menu. Down arrow to the next entry down and boot it (thats your previous kernel).

See if thats any more stable. Based on the above though, it sounds to me more like a memory/cpu hardware issue. ;(

[demetris]

Thanks a lot for answering. I tried the 2 older kernels that Fedora keeps and I haven't notice any change. It worths another shot tho.
A hardware issue huh... that's sudden. I guess I will run a memtest for times being.

---------- Post added at 02:05 AM ---------- Previous post was at 01:28 AM ----------

uhuh... memtest reports many errors, especially from the 2nd or the 3rd DIMM...