System keeps locking up

From: John Aldrich 
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My Fedora 20 desktop keeps randomly locking up. It only happens when I try to 
un-blank the screen, which suggests to me that perhaps it's trying to 
hibernate, but I don't think I have that enabled. Anything else I should 
check? I looked at the /var/log/messages, but there's nothing there since it 
last locked up yesterday evening and I had to hard-reboot. :(

=============================================================== From: John Aldrich ------------------------------------------------------ OK. First time it has happened when I wasn't trying to unlock the screen. I was just sitting here exploring screen savers, on the thought that maybe it might be the noveau driver locking up on my GL screen saver when my display freaked out. I got a black screen with diagonal bits all over it. I even had an SSH window from another machine logged in and it was frozen out. :( Again, nothing in the /var/log/messages. :(

=============================================================== From: Benjamin Stewart ------------------------------------------------------ Have you tried /var/log/Xorg.0.log?

=============================================================== From: Wil Wade ------------------------------------------------------ Random lockups (although less likely in your case) is generally a good time to run memtest86 If you do not already have it in your grub menu (hold down esc while booting to see the menu if it is too fast), you can get it with # yum install memtest86 When it locks up have you tried ssh'ng into it?

=============================================================== From: John Aldrich ------------------------------------------------------ Quoting Wil Wade : Yes. I have. This morning I actually had an SSH window on my Windows machine logged into the Fedora box before it locked up. When I switched to my Windows machine, the SSH window was non-responsive. :( I'll try a boot CD and test my memory. It *should* be good, though, I think. OTOH, I only have 4 Gigs (max my system will hold...time to upgrade???)

=============================================================== From: DaWorm ------------------------------------------------------ Old school fix alert... Pull all your cards and RAM and polish the edge contacts with a pencil eraser and then reinstall. I've had more than one system come back to life after this. Jeff.

=============================================================== From: John Aldrich ------------------------------------------------------ Quoting DaWorm : Hmm... yeah. Didn't think about that. :) Good idea, Worm! :D

=============================================================== From: kitepilot@kitepilot.com ------------------------------------------------------ Hmmmmmmmmm... Good idea! What kind of pencil eraser do you use to clean the slot? :-) ET John Aldrich writes:

=============================================================== From: DaWorm ------------------------------------------------------ Plug the clean card in and out multiple times. (Back in the ISA days, I once used an emery board - NOT RECOMMENDED!).

=============================================================== From: John Aldrich ------------------------------------------------------ Quoting Benjamin Stewart : Yes, I have. Not very informative. :(

=============================================================== From: Benjamin Stewart ------------------------------------------------------ Not surprising, now that I realize the whole system freezes, too. Sounds like hardware to me. I agree with the others - start with memtest, then play the process-of-elimination game. Good luck! I hate problems that don't tell you what's up.

=============================================================== From: Billy ------------------------------------------------------ Sounds like a video driver or hardware bug. check for updated drivers, firmware, or dust bunnies. Sent from my iPhone

=============================================================== From: John Aldrich ------------------------------------------------------ Quoting Benjamin Stewart : Thanks. Don't have much to test... a GigE card, a SATA controller, that's about it. Video is on-board and I think I"m out of slots on this motherboard, so I might just end up upgrading. I saw a package deal of motherboard, CPU and fan for like $130 on Tiger Direct. 'Course it didn't include any RAM, but I can probably get that cheaper off Crucial than I can off TD!

=============================================================== From: Dan Eveland ------------------------------------------------------ I had a problem similar what you describe. Turns out the Asus on-board video was the issue. It was not compatible with Ubuntu (or it was damaged in some way). I tried 32 and 64 bit etc. Non-Linux OS worked fine. A soon as I went headless or tried a seperate video card everything worked perfectly as well. It would lock up on reboot (the shutdown part of rebooting), although I never tried waking from sleep as it was a server. Dan

=============================================================== From: John Aldrich ------------------------------------------------------ Quoting Dan Eveland : Hmm... I've had it on a line-interactive UPS pretty much from the word go so there shouldn't be any stray electric surges getting to it and I don't think I have any more slots open to put in a video card, so I may end up just upgrading it again.... but then again I haven't upgraded it in several years. :) Last upgrade was, I think, adding a 1Tb HDD. :)

=============================================================== From: Benjamin Stewart ------------------------------------------------------ You keep saying you don't have any slots open - does that imply there are several, full slots? If so, try removing all of the devices and running it for a while.

=============================================================== From: John Aldrich ------------------------------------------------------ Quoting Benjamin Stewart : This motherboard has two PCIX slots. One is taken up by the GigE card and the other is taken up by the SATA controller. I'd rather not give up either of those for obvious reasons. :) I also posted this problem on the Fedora group and someone else who'd had similar problems said he'd tracked it down to the noveau driver and switching to the binary nVidia driver fixed it. He also said the noveau dev team was very interested in the problem, so I'll see what I can do about getting together log files and sending 'em upstream before switching to the binary driver (if I can figure out how to install it again.... been awhile since I had to do that!)