[Bug 205049] garbled graphics

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=205049

--- Comment #5 from lechp at onet.pl ---
Ok, this is what I've tried: holding shift to force the boot menu to show up,
then pressing e to edit the options for kernel version 5.2.17, then appending
amdgpu.ppfeaturemask=0xffff3fff, and finally pressing Ctrl-x.

If I add a space and put the text at the end of the last line with text already
on it, the error appears for a few seconds, then the Lenovo splash screen
appears indefinitely and nothing else happens until I cycle the power.

On the other hand, if I put the text on a new line, there's no error message
and Fedora boots normally, but the graphics issues persist.
I tried a total of 6 different boot edits with amdgpu.ppfeaturemask=0xffff3fff, 
amdgpu.ppfeaturemask=0xfffdbfff, and amdgpu.ppfeaturemask=0xfffd3fff, with the
same result each time.

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