[Bug 106671] Frequent lock ups for AMD RX 550 graphics card

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106671

--- Comment #13 from Alan W. Irwin <Alan.W.Irwin1234 at gmail.com> ---
Well, after 1.5 (successful) days with the remote graphics experiment, I
decided instead it made more sense to go after the quicker acting instability
that I have previously experienced in direct graphics mode.  So just now I have
started
a direct graphics experiment after a Debian Testing upgrade which included the
following firmware and mesa changes:

firmware-amd-graphics updated "(20180825+dfsg-1) over (20180518-1)"

mesa updated "(18.1.7-1) over (18.1.6-1)"

In addition for this experiment I installed the  amd64-microcode package
that contains "microcode patches for all AMD AMD64 processors".

Also, as part of this experiment I have continued with the idle=nomwait kernel
parameter as verified by 

irwin at merlin> cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-4.17.0-3-amd64
root=UUID=1e45a1ee-a5d6-4327-9a7b-2663ffc0b157 ro rootwait quiet idle=nomwait

N.B. note those kernel parameters do not include any amdgpu-related parameters.
 Do you recommend any such parameters for the RX 550 such as amdgpu.dc=1 which
is sometimes recommended for older versions of AMD new-generation graphics
hardware?

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