Comment 24 for bug 1872001

This is probably the same as bug #1871867, can you confirm?

I've had this bug ever since upgrading to Ubuntu 18.10 (i.e. the Linux 5.3 kernel series). However before the 5.3.0-46-generic update (when I was on 5.3.0-45-generic and earlier versions), I had this issue (freezes of around ~10s) only a few times per day. After the 5.3.0-46-generic update, this bug happened several times per hour, sometimes repeating in the timeframe of minutes.
Though I only rarely get the "GPU HANG: ecode 9:0:0x00000000, hang on rcs0" message prior to the "Resetting rcs0 for hang on rcs0" message, for what's it worth.

To put this into numbers, from April 4 to April 9 (daily usage), I only got 6 freezes, whereas since the update to 5.3.0-46-generic (which I performed on April 10), I've got 122 hangs already. This makes using the whole system really annoying.

There are some interesting discussions about this bug on https://bbs.archlinux.org/viewtopic.php?id=250765, though note that there seem to be multiple bugs and it got worse with later kernel versions, including unrecoverable freezes on kernel 5.4 (which were reported in Ubuntu as bug #1861395).

I've reverted to Linux 4.19 LTS mainline kernel from https://kernel.ubuntu.com/~kernel-ppa/mainline/ for now, and haven't had any more freezes yet.