Comment 551 for bug 1690085

(In reply to Another User from comment #463)
> I have random freezes with Ryzen 2200u laptop. Display image just freezes
> and system stops responding. Only way to get out from this state is to
> holding power button (even magic SysRq key does not work). No any clues in
> logs.
>
> With Ubuntu 18.04 it was happen nearly once per week (not intense use).
> After installing 18.10 things become more stable - I've got first lockup
> after 6 weeks and another after 3. Hangs are completely random and on
> different cpu load - once I've got this while gaming (and ambient noise
> continue playing...)
>
> I've tried idle=nomwait but this did not help on 18.04 - and line
> "monitor-mwait will be used for idle loop" was still present in dmesg with
> this parameter!
>
> idle=halt parameter completely disables mwait instruction in kernel and also
> forces use of only C1 state. In my laptop it does not cause higher battery
> drain or any suspend-resume issues. But I've not tested it completely an
> used it for few days... So this may be even not the solution for my problem.

You freeze seems GPU related, try a new kernel/firmware