Re: Nvidia Optimus, Debian 10, and Firefox ESR crashes

[David Wright <deblis@lionunicorn.co.uk>]

On Sun 03 Jan 2021 at 15:41:26 (-0800), David Christensen wrote:
> On 2021-01-03 06:51, Alexander V. Makartsev wrote:
> > On 03.01.2021 02:52, David Christensen wrote:
> > > 
> > > Any suggestions for trouble-shooting the crashes?
> > > 
> > Have you checked the systemd journal?
> > Even after you reboot frozen system you can see last syslog
> > messages easily from previous boot with this command:
> >      $ sudo journalctl -b -1
> > 
> > Journald keeps logs from multiple previous boots.
> >      $ sudo journalctl --list-boots
> > 
> > You can select them by index. ( "0" is current boot, "-1" is
> > previous boot, etc. )
> 
> 2021-01-03 14:01:19 root@dipsy ~
> # journalctl -b -1
> Specifying boot ID or boot offset has no effect, no persistent journal
> was found.
> 
> 2021-01-03 14:01:29 root@dipsy ~
> # journalctl --list-boots
>  0 8b60854b67c243679bec112a7050f054 Sun 2021-01-03 14:01:00
> PST<E2><80><94>Sun 2
> 
> No of much use (?).
> 
> Start Firefox, browse YouTube, play video "Relaxing Christmas Jazz
> Music 10 Hours" (not in full screen) -- crashes after ~50 minutes:
> 
> 2021-01-03 15:35:15 root@dipsy ~
> # journalctl -b -1
> Specifying boot ID or boot offset has no effect, no persistent journal
> was found.
> 
> 2021-01-03 15:35:18 root@dipsy ~
> # journalctl --list-boots
>  0 8b60854b67c243679bec112a7050f054 Sun 2021-01-03 14:01:00
> PST<E2><80><94>Sun 2
> 
> Again, not of much use (?).  How do I get information out of the
> systemd journal?
> 
> dmesg(1) has some information, both about boot and the crash:
> 
> 2021-01-03 15:40:07 root@dipsy ~
> # dmesg | grep nouveau | head -n 30

[…]

> 2021-01-03 15:40:14 root@dipsy ~
> # dmesg | grep nouveau | wc
>     519    3686   34789
> 
> Suggestions?

I don't have persistent journalling set, but I see very little in
journalctl -b   that's missing from my ordinary logs, particularly
/var/log/journal of course, but also daemon.log and syslog.

Cheers,
David.