[ltp] diagnosing a freeze on T60p with ubuntu hardy

[Phil Shotton]

I'm using the radeon driver, not the proprietary one. Interestingly if I 
use the default video output mode (xv) with mplayer I don't get the 
problem. It's only if I use the gl2 driver, which suggests the problem 
may be in mesa rather than the radeon driver? (not sure - I don't 
understand much about the various video components).

It's definitely a full hang as you say. Perhaps the video card is being 
written to in a non-safe way.

Phil

Scott Rossillo wrote:
> I have the same problem with a ThinkPad T60.  I'm running the newest
> Ubuntu 8.04 now but this happened back with Fedora 6 and 7 as well.
>
> My best guess is that it's related to the ATI hardware or ATI proprietary
> driver.  The weird thing is that it's a full system hang, not a kernel
> panic making me think there's a hardware problem.
>
> Ironically, without a kernel panic, there is no way gather evidence into
> what caused the problem.
>
> ~ Scott
>
>   
>> What is your graphics card, and what are you doing at the time of the
>> freeze?
>> I can get exactly the same symptoms (frozen system but with stuttering
>> sound) pretty reproducibly by playing a video in mplayer using the gl2
>> video output and selecting full-screen. This is with an ATI Mobility
>> FireGL V5250.
>> Provided I don't play video then 99% of the time it's fine.
>>
>> Phil
>>
>> Brad Langhorst wrote:
>>     
>>> My computer has been freezing once a day or so for the last month or so.
>>>
>>> By freeze i mean that the sound stutters with whatever was playing, the
>>> screen does not draw, and alt+sysreq command have no effect.
>>>
>>> I must reboot by holding down the power button for a while.
>>>
>>> Very frustrating.
>>>
>>> I want to be able say with some certainty whether this problem is
>>> hardware or software related.
>>> 
>>> I'm leaning toward a hardware problem  - but I'd like to provide some
>>> convincing evidence of that to Lenovo support.
>>>
>>> I hope I'm not going to have to run with windows for a while to convince
>>> them that it's a hardware problem (if in fact it is a hardware problem).
>>>
>>> I've recently done a fresh installation of Ubuntu hardy which has not
>>> caused a change in the frequency of freezes.
>>>
>>> so far my log of freezes indicates:
>>>  - can happen on my desk or on the train
>>>  - can happen while listing to music or not
>>>  - can happen whether connected to a network or not
>>>  - can happen whether VMware is in use or not
>>>  - can happen even with normal temperatures on all sensors
>>>
>>> What other criteria should I examine?
>>>
>>> Is anyone else with the same hardware (T60p) experiencing this problem
>>> with a default Ubuntu hardy installation?
>>>
>>> thanks for any help on this!
>>>
>>> brad
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>       
>> --
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>>
>>     
>
>
>