https://bugs.freedesktop.org/show_bug.cgi?id=106671
--- Comment #9 from Alan W. Irwin <alan.w.irwin1...@gmail.com> ---
We (there are two of us using this machine) just got yet another kernel lockup
(no remote access possible with ssh, direct keyboard not working), but this is
a case when we were remotely accessing this box with an X-terminal. In other
words, the only use of the RX 550 was to display the command-line login prompt
for the Linux console of the directly attached monitor until the lockup where
it displayed the following message (roughly 15 times in the half-hour before I
got out of the lockup by pushing the reset button.)
watchdog: BUG: soft lockup - CPU#12 stuck for 22s! [firefox-esr:29266]
(At the time we were both browsing different sites with firefox with one of
those firefox instances running a couple of days, and as a security measure we
both restrict the use of javascript with the noscript extension to firefox.)
I have attached a tarball containing log files (kern.log and syslog) that
contain the lockup information (including the above message) as well as
information about the fresh boot afterwards. (For what it is worth, that
tarball also includes dmesg output which appears to contain information only
about the fresh boot.)
For this minimal use case for the RX 550, the Linux kernel lasted 6 days before
the lockup which is much better than the direct use case where the lockups can
occur as soon as a half hour after a fresh boot. So the current lockup could
be due to an entirely different bug than in the lockups I have encountered for
the direct use case. But, of course, minimal use is not zero use so currently
I ascribe both the present remote-use lockup and the previous direct-use
lockups to some incompatibility between the RX 550 and the Debian Testing
graphics stack. That stack currently includes the following component
versions:
linux-image-4.17.0-3-amd64 4.17.17-1
firmware-amd-graphics 20180518-1
libdrm-amdgpu1:amd64 2.4.93-1
libglapi-mesa:amd64 18.1.6-1
xserver-xorg-video-amdgpu 18.0.1-1+b1
Please let me know if there are any other data you need or any experiments you
would like me to try. In any case I plan to continue with remote use of this
box while reporting lockup incidents as they occur. But I also plan to try
direct use again whenever one of the components of the above stack gets
significantly upgraded for Debian Testing.
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