[Bug 91880] Radeonsi on Grenada cards (r9 390) exceptionally unstable and poorly performing

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91880

--- Comment #33 from John Frei <johann_frei at yahoo.de> ---
I've tried the new stuff by the following steps:
-cloning the code from the new_smc branch...
-I enabled the "Enable amdgpu support for CIK parts" due to a recommendation on
reddit.
-compiling and installing the kernel+modules...
-I placed the ucode to /lib/firmware/radeon and /lib/firmware/amdgpu
-The rebuild of the modules was done by 'sudo dracut -f'. <-- I hope this is
the correct command.

-Then I rebooted the system with 'rdblacklist=0 amdgpu.enable_scheduler=1'.
-I was able to log in and use the system for a short time until the screen went
black. (~1min)
-BUT: I pressed ALT+CTRL+F4 and 'blindly' typed my login credentials and was
able to 
 dump the dmesg output to file (attachment). The number lock could be switched
on/off for a few seconds.
 Even though the screen remained black.
-Then I booted with unmodified kernel parameters.
-A few seconds after the login screen appeared the screen switched to black.
-Unlike the first try with amdgpu I wasn't able to execute a 'dmesg >> file'.
 The number lock couldn't be switched on/off anymore.

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