On Fri, Jul 19, 2019 at 01:30:48 +0200, gentoo-u...@c-14.de wrote: > [2019-07-18 23:29] jdm <j...@jdm.myzen.co.uk> > > Hi, > Hi,
> > For the last 2 months I have been getting a problem where my machine > > locks and after 2 seconds goes to a black screen. The machine is then > > unusable, ctrl-alt-delete F1 or sys rescue keys do not work and you > > cannot remote login. > > I initially thought this was a problem with lxd but then experienced > > issue when just using Enlightenment desktop. I have switched to xfce4 > > but still getting issue. > > It happens 2 to 3 times a week. > > There is nothing in logs (/var/log/messages). > > I upgraded BIOS a beginning of year so don't think it's that but have > > just upgraded again to see if that helps. > > Running ASUS Prime x470 Prime with ryzen 2700 and have upgraded kernel > > to latest stable when running emerge --update... I've been having this problem ever since I built my "new" (April 2017) machine, Ryzen something or other on an ASUS Prime x370pro. My machine has been hanging, perhaps, about once a week. > I'm not sure if it's still an issue with the 2nd gen cpus, but at least > with the first gen's I had lockups until I disabled the c-state > functionality in the UEFI. There was a previous thread on this list > discussing the issue which might be interesting if you haven't read it > yet [1]. Thanks for the tip! I've just disabled c-state (whatever that might be) in my UEFI BIOS, and so far my machine hasn't hung. The test will be whether or not it continues not to have hung over 4 - 6 weeks. Unfortunately, the speed of the machine is ~10% slower than with c-state enabled. On a CPU intensive benchmark, I get these timings: With c-state enabled: 18.236s With c-state disabled: 20.052s > [..] > [1]: > https://archives.gentoo.org/gentoo-user/message/1cfd9cd62796b4a41a2152a66cc1df0e -- Alan Mackenzie (Nuremberg, Germany).