https://bugs.freedesktop.org/show_bug.cgi?id=109206

--- Comment #54 from Joe Coutcher <joseph.coutcher@gmail.com> ---
Ondrej - I'm on a fresh install of Ubuntu 19.04 with no workarounds applied,
using a similar setup to yours (HP Envy x360 15m-bq121dx.)  I installed kernel
5.2 RC7 (since the AMD64 build of 5.2 final on kernel.ubuntu.com is broken),
and updated to the latest linux-firmware package available on the disco feed
(1.178.2).  I should also note I'm on HP BIOS firmware version 21.  While the
system boots to the desktop environment, there's tons of garbage, and when
using Firefox, screen writes are occuring on random parts of the screen.  Also,
I attempted running Basemark Web 3.0 in Firefox, and can consistently lock up
the machine.  For reference, the kernel version is 5.2.0-050200rc7-lowlatency.

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