F12: Laptop switches off

[linker3000]

Edit #3: The laptop has cut out while running Windows so this is NOT an F12 issue - something's up with my hardware.

May be a total coincidence, but I upgraded my Travelmate 4060 from F11 to F12 last week and three times since, it has just switched off without warning as if all power has been cut. When this happens I have to remove the battery for a minute to get the laptop to power on again. If I run the laptop off battery it behaves fine - and by that I mean that the laptop will run for several hours as expected rather than the battery dying after a few minutes as if it's reaching the end of its life. The battery is only about 6 months old.

I can't see any pattern to the power off and it may be nothing to do with F12 but I thought I'd mention it just in case anyone else can do a 'me too' or point me towards anything possibly relevant.

Thanks.

Edit - from /var/log/messages...relevant?

Nov 22 16:32:08 tm4060 kernel: metacity[1633]: segfault at 616d2078 ip 038e09e1
sp bfe1d250 error 6 in libSM.so.6.0.0[38df000+7000]
Nov 22 16:32:08 tm4060 abrtd: Directory 'ccpp-1258907528-1633' creation detected
Nov 22 16:32:08 tm4060 abrtd: Lock file '/var/cache/abrt/ccpp-1258907528-1633.lo
ck' is locked by process 1671
Nov 22 16:32:08 tm4060 abrt: saved core dump of pid 1633 to /var/cache/abrt/ccpp
-1258907528-1633/coredump
Nov 22 16:32:08 tm4060 abrtd: Getting local universal unique identification...
Nov 22 16:32:08 tm4060 abrtd: Crash is in database already

Edit #2: Related to: https://bugzilla.redhat.com/show_bug.cgi?id=539450 Maybe?

[georgesdev]

My laptop had something similar, but on Fedora 11.

When powering back on it complained of the system's temperature.

I used the following command in a shell to monitor the temperature:
watch -d -n 60 acpitool
then i determined I had to clean the laptop's blower

[piemmea]

I have a dual boot Vista - F12 (newbie-installed). Everything worked fine, till I run a process quite CPU-demanding--> power went off. With Vista I do not have the same problem. I have an Asus Z53T with AMD Turionx2 cpu; I read somewhere that the problem could be the turion. I have no idea how/if this is true. Any clue?
tnx

[PavanKY]

I had a similar problem when I was running CPU intensive programs (such as videos and so on). It happened to me on ubuntu as well as fedora but strangely never on Vista.

Anyway, I cleaned up the dust on the motherboard and the cooling system (the fan and everything that surrounds it). It works fine now.

I have to remind you, cleaning a laptop fan isnt something amateurs should be doing. I found that out the hard way by breaking couple of sensitive wires..

[linker3000]

Thanks for the feedback. I haven't ruled out a thermal problem, but it's not high on my list at the moment. The laptop can be booted to XP Pro so I might leave it running something in that for a while to see what happens.

[piemmea]

thanx for your feedback. i will try to rule this out! bye