[xubuntu-users] Total system freeze, hard reboot.

[Fred Roller]

On 09/04/2015 02:58 AM, Petter Adsen wrote:
> On Fri, 4 Sep 2015 00:09:11 -0400
> Fred Roller <fredroller66 at gmail.com> wrote:
>
>> Hi all,
>>       This one has me almost stumped and I am looking for some new
>> insight please.
>>
>> Symptom:
>> Absolute system freeze.  No Keyboard. No mouse. No SSH. No REISUB.
>> Screen at last spot shown w/ no artifacts.  Only option is a hard
>> reboot.  Logs from Mate suite show no errors around time of crash.
:::snip:::
>> Every time? Sounds like a bug in either the kernel driver for your GPU
>> or the X server. Have you filed a bug report? Also, try newer/older
>> kernels, you can find them here:
>>
>> http://kernel.ubuntu.com/~kernel-ppa/mainline/
Yes, every boot.  When I played online games, watched video, etc.  I 
have not filed a bug because of lack of information atm.  I think I have 
it narrowed down.
>
>> from this bug report:
>> https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/993187
> I didn't read the whole thing, but this is really old, and a fix has
> been released. I suggest you file a new one.
reports on the web were all over the place and this just seemed most 
informative for trying different things.  I presumed a fix for something 
this old but some forums showed a persistent issue.  For me it is just 
trying to isolate now that I can reproduce.
>
>> decided to turn off composer:
>> All settings --> Windows Manager Tweaks --> Compositor --> Uncheck
>> "Enable display compositing"
> You can also try running VLC with another backend, I think it uses
> VDPAU by default. Or try another player.
If current tests fail I will go to this next.  Yes, reinstalled parole 
and produced failure.  Played Champions of Regnum as only program going 
and produced failure. Youtube in firefox and produced failure.
>> This is where I am atm.
>>
>> My system is:
>> Acer ES1-711-P14W
>> Xubuntu 15.04
>>       Kernel 2.19.0-26-generic (x86_64)
>                ^
> I hope that's a typo?
:)- Ooops, 3.19*
>
:::snip:::
> What do you mean "disengaged all connections"? Just that you weren't
> actively using the network? If you suspect the NIC, you could try
> unloading the kernel module, 'lsmod -k' will show you what module is in
> use. But if this happens when you try to play a DVD, I wouldn't really
> suspect the NIC unless I had some indication it was involved. Have you
> installed the Realtek firmware package?
I unplugged and "disconnected" from task bar. Just stopped network 
traffic. Will unload kernel module in the battery test if necessary.
>
>> Loaded MATE system log and psensor early on to monitor.  Logs, as
>> mentioned show no errors; so I presume the crash does not give the
>> system time to register. psensor was showing over heating (no air
>> conditioning here) and processors were set for "performance". I reset
>> the processors for "powersave" and have had normal temps and still am
>> freezing up. This dismissed the overheating theory.  I have no way to
>> monitor GPU temperatures but given the freezes are random in time, i.e.
>> 5 min to 2 hrs. I have put this at a "not likely" status.
> Are you saying the freezes are random, or happening when you play a DVD?
Random, see above.
>
>> Status: waiting while I push the system with compositor turned OFF.
>>
>> Any ideas would be appreciated if this fails.  If this works, then ideas
>> to fix.  I don't like having to turn off functionality to make the
>> system work.
> Nor should you. I would try a newer kernel. There is information on the
> Ubuntu wiki on how to do this if you don't know how, start here:
>
> https://wiki.ubuntu.com/Kernel/
>
> Also, file a bug. It's the only way to get it fixed (if it isn't
> already in a newer release), but you need to be very clear on how and
> when it happens.
>
> Petter
Sounds good, I will look into a new kernel.  I reserved a bug report 
until I could isolate issue, esp. since no log errors were giving any 
help. So far the compositor fix seems to be working. On third video and 
still no freeze.  Thank you Petter for the input, helpful.
>
>

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