[ltp] Lockups with T520

[Martin Steigerwald]

Am Montag, 23. Mai 2011 schrieb Robert Tomsick:
> On Mon, 2011-05-23 at 14:39 +0200, Ole Langbehn wrote:
> > Hi,
> > 
> > I got a new T520 about 5 weeks ago. Since then, I've had complete
> > lockups about every other day. Sometimes it happens three times a
> > day, sometimes the box runs for a couple of days without error.
> > 
> > The symptoms are:
> > 
> > * screen freezes
> > * can't connect to box via network
> > * sound playback goes to very short loop
> > * after reset, the log files (/var/log/messages, Xorg.log) don't show
> > anything related to the lockup
> > 
> > These lockups happen with a gentoo install as well as with an ubuntu
> > 11.04 install. I've also tested the memory and swapped it around,
> > tested with just one memory bank, shut down wireless and other not
> > needed hardware, all to no avail.
> > 
> > So, my questions are:
> > 
> > * Has anyone with a T520 experienced these or similar lockups?
> > * Does anyone know how to further analyze the problem?
> > * What are the chances of this being a hardware issue?
> 
> Do you have an Intel WLAN card?
> 
> If so, grab the latest experimental firmware and try using that.

I did not have a lockup so far, but I did not yet try to use the WLAN 
stuff.

I found that with kernel 2.6.38 the intel drm/kms driver had some hangs 
which made X.org with kwin compositing real slow. But I did not see this 
with kernel 2.6.39. There has been something on Phoronix related to that 
hangcheck timer log message related issue.

So far I am really satisfied, the thing just works.

Only thing the the fan, in the first 5 minutes or so it is at 1400 to 1500 
rpm according to powertop and I do not hear the laptop *at all*, but then 
it goes up to about 2700 to 2800 rpm and stays there. Then I head the fan. 
But thats another topic raised often enough here it seems.

-- 
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7