[Bug 201625] New: Amd RX560D VERY slow after upgrade.

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=201625

            Bug ID: 201625
           Summary: Amd RX560D VERY slow after upgrade.
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.19.1
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: blocking
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: drigoslkx@gmail.com
        Regression: No

OK, I got two new rx560D in november, and I need to use Slackware current,
because Slackware 14.2 it didn't worked.
That time the Slackware current came with kernel 4.9.50, mesa 17, xorg-server
1.19.3 and xf86-video-amdgpu-1.3.0. It worked perfect, the blender viewport was
really fast, it holds about 30 trillions of faces, it was really impressive.
Ok I have two machines (I bought two rx560d) in one machine I keep upgrading
slackware current, and after the ship of the new kernel (I think 4.10...)
things became very slowly, the viewport was very slowly, it reach something
like 6 trilions and it became horrible slowly. Its hard to track what was wrong
because when you upgrade slackware current it upgrade all other packages, not
only the kernel.
So after a year using waiting for some news, I tried the lastest kernel 4.19 in
the lastest slackware 16/09/2018 (xorg-server-1.20.1-x86_64-1,
mesa-18.2.0-x86_64-1, xf86-video-amdgpu-18.1.0-x86_64-1) and even with the
lastest kernel, compiled with all those news libraries the viewport is still
slow (I tried to upgrade blender too, didnt work).
So I tried to go back to the kernel 4.9.50 that was still working with the
other pc (is the exactly the same pc, I just have two because of my job) and
this old kernel didnt work, the X didnt initiate, and I got a black screen, and
system froze, and I have to restart using the button.). I think that the kernel
is too old for the libraries.
So I got the other pc with the all old slackware curret (that one with the
kernel 4.9.50 its from 15/09/2017) and upgrade the kernel, to the lastest one,
I compiled it by hand, and know what!? The viewport got slowly, about 6
trillions of faces it became unusable. Even with the old libraries (xorg, mesa
and amdgpu), So I think that something wrong with amdgpu driver in the kernel,
or they are doing it because they want to, I don't know.
Somebody please could help me?
Its already take one year with this problem and I don't know if I have to
contact Amd, Linus or you guys. I already tried the lastest ubuntu, didnt work
(because as I said the kernel was new) and I already tried the amdgpu property
driver, but still slow (I think slower than the open one). But the driver that
is in kernel 4.9.50, its awsome its about 5x faster. Please help me to fix
this.
I'm from Brazil sorry my bad english.

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