[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 #17 from Alan W. Irwin <Alan.W.Irwin1234 at gmail.com> ---
I terminated the last test immediately because it turns out a new kernel (Linux
merlin 4.18.0-1-amd64 #1 SMP Debian 4.18.6-1 (2018-09-06) x86_64 GNU/Linux) has
propagated from Debian Unstable to Debian Testing = Buster so I will use that
kernel for my new test.  On boot with this new kernel the usual blast of random
color on the Linux console displayed by the RX 550 that I am used to for all
previous kernel versions is now gone.  So that is a positive step in the right
direction, and I hope that means the Debian Buster graphics stack is finally
completely stable for the RX 550, but I will test that hypothesis with this
latest test.  

The latest Debian Buster graphics stack versions for this direct graphics
kernel stability test for the RX 550 are as follows:

linux-image-4.18.0-1-amd64                    4.18.6-1
amd64-microcode                               3.20180524.1
firmware-amd-graphics                         20180825+dfsg-1
libdrm-amdgpu1:amd64                          2.4.94-1
libglapi-mesa:amd64                           18.1.7-1
xserver-xorg-video-amdgpu                     18.0.1-1+b1

Here are my kernel parameters which includes the suggested idle=nomwait:
irwin at merlin> cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-4.18.0-1-amd64
root=UUID=1e45a1ee-a5d6-4327-9a7b-2663ffc0b157 ro rootwait quiet idle=nomwait

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