[Bug 104932] Hang when running X11/Wayland on GFX8/Polaris10/Ellesmere/Rx-480-8GiB (agd5f a5592a6df4f45a018b48f252ad1c498e683e9b9d, hwentland's DC-Patches-Jan-31-2018.mbox applied)

[Bug 104932] Hang when running X11/Wayland on GFX8/Polaris10/Ellesmere/Rx-480-8GiB (agd5f a5592a6df4f45a018b48f252ad1c498e683e9b9d, hwentland's DC-Patches-Jan-31-2018.mbox applied)

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=104932

            Bug ID: 104932
           Summary: Hang when running X11/Wayland on
                    GFX8/Polaris10/Ellesmere/Rx-480-8GiB (agd5f
                    a5592a6df4f45a018b48f252ad1c498e683e9b9d, hwentland's
                    DC-Patches-Jan-31-2018.mbox applied)
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: robink@creosotehill.org

Created attachment 137158
  --> https://bugs.freedesktop.org/attachment.cgi?id=137158&action=edit
Kernel serial log while firing up the Awesome WM

Hello-
    I've been having (for a while now, and going back a bit in terms of AMDGPU
tree commit history) an issue whereby the framebuffer & graphics stack
(*usually* not the kernel writ large) will hang upon firing up XOrg's XServer
or a Wayland compositor (in my case, GNOME-Shell).
    What compounded my frustration was that I'd rarely (if ever) see any output
from the Xorg server, the Wayland compositor, or the kernel indicating there
was any sort of problem, save for a trapped SIGQUIT (trap3) hitting
gnome-shell.
    Finally, in firing up X11 directly w/ Awesome as the WM I obtained some
kernel output which will hopefully prove useful in diagnosing this issue.  It's
below (and attached):
amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00500002
amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x0A088002
amdgpu 0000:01:00.0: VM fault (0x02, vmid 5, pasid 32768) at page 5242882, read
from 'TC6' (0x54433600) (136)
[drm:amdgpu_job_timedout] *ERROR* ring gfx timeout, last signaled seq=45, last
emitted seq=48
[drm] IP block:gfx_v8_0 is hung!
[drm] GPU recovery disabled.

Doubt it's tremendously useful, but kernel output with gnome-shell (in this
case acting as a Wayland compositor) is below and attached as well:
traps: gnome-shell[1260] trap int3 ip:7f6e4b956e01 sp:7ffe72a8aa50 error:0 in
libglib-2.0.so.0.5200.3[7f6e4b908000+10f000]
traps: gnome-shell[1336] trap int3 ip:7f0f89b3ee01 sp:7ffefd8d3df0 error:0 in
libglib-2.0.so.0.5200.3[7f0f89af0000+10f000]
traps: gnome-shell[1351] trap int3 ip:7f0984cb6e01 sp:7ffd3caa7650 error:0 in
libglib-2.0.so.0.5200.3[7f0984c68000+10f000]

Lastly, my Xorg.0.log is attached, but you'll find it's quite boring (no
complaints, which is good, but seemingly no useful debugging information,
either).

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[Bug 104932] Hang when running X11/Wayland on GFX8/Polaris10/Ellesmere/Rx-480-8GiB (agd5f a5592a6df4f45a018b48f252ad1c498e683e9b9d, hwentland's DC-Patches-Jan-31-2018.mbox applied)

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=104932

--- Comment #1 from Robin Kauffman <robink@creosotehill.org> ---
Created attachment 137159
  --> https://bugs.freedesktop.org/attachment.cgi?id=137159&action=edit
Kernel serial log while firing up gnome-shell as a Wayland compositor

Forgot that Bugzilla nominally allows only one attachment per comment.

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[Bug 104932] Hang when running X11/Wayland on GFX8/Polaris10/Ellesmere/Rx-480-8GiB (agd5f a5592a6df4f45a018b48f252ad1c498e683e9b9d, hwentland's DC-Patches-Jan-31-2018.mbox applied)

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=104932

--- Comment #2 from Robin Kauffman <robink@creosotehill.org> ---
Created attachment 137160
  --> https://bugs.freedesktop.org/attachment.cgi?id=137160&action=edit
Xorg.0.log from firing up X directly with Awesome as a WM (Boring)

Finally, Xorg.0.log

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[Bug 104932] Hang when running X11/Wayland on GFX8/Polaris10/Ellesmere/Rx-480-8GiB (agd5f a5592a6df4f45a018b48f252ad1c498e683e9b9d, hwentland's DC-Patches-Jan-31-2018.mbox applied)

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https://bugs.freedesktop.org/show_bug.cgi?id=104932

--- Comment #3 from Robin Kauffman <robink@creosotehill.org> ---
Oops, discovered too late that INT3 is used to set a breakpoint.  Regardless,
it's still something SIGTRAP-ish (i.e. SIGDUMP-CORE-AND-TERMINATE).

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[Bug 104932] Hang when running X11/Wayland on GFX8/Polaris10/Ellesmere/Rx-480-8GiB (agd5f a5592a6df4f45a018b48f252ad1c498e683e9b9d, hwentland's DC-Patches-Jan-31-2018.mbox applied)

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https://bugs.freedesktop.org/show_bug.cgi?id=104932

--- Comment #4 from Michel Dänzer <michel@daenzer.net> ---
Which versions of Mesa & LLVM are you using?

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[Bug 104932] Hang when running X11/Wayland on GFX8/Polaris10/Ellesmere/Rx-480-8GiB (agd5f a5592a6df4f45a018b48f252ad1c498e683e9b9d, hwentland's DC-Patches-Jan-31-2018.mbox applied)

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https://bugs.freedesktop.org/show_bug.cgi?id=104932

--- Comment #5 from Robin Kauffman <robink@creosotehill.org> ---
(In reply to Michel Dänzer from comment #4)
> Which versions of Mesa & LLVM are you using?

LLVM & Clang 7.0 Git, LLVM commit e0c16f05e9fbc1dcd291814ceab9dbc5, Clang
commit e0c16f05e9fbc1dcd291814ceab9dbc5.  Both were merged 2018/01/31.  Let me
know if you need more detail.

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[Bug 104932] Hang when running X11/Wayland on GFX8/Polaris10/Ellesmere/Rx-480-8GiB (agd5f a5592a6df4f45a018b48f252ad1c498e683e9b9d, hwentland's DC-Patches-Jan-31-2018.mbox applied)

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https://bugs.freedesktop.org/show_bug.cgi?id=104932

--- Comment #6 from Robin Kauffman <robink@creosotehill.org> ---
(In reply to Michel Dänzer from comment #4)
> Which versions of Mesa & LLVM are you using?

My sincere apologies, I neglected to include the version of Mesa et al. 
Unfortunately, it was reading comprehension that failed me, not attention or
due diligence.  Here's what's installed:

libdrm Git master, commit 9e34ad590e0e1003a597b8cc790a3f36830ba993, merged
1/31/2018.
libclc Git master, commit 13541fc0c779cbadbda793c67a0402558ff92ab6, merged
1/31/2018.
Mesa Git master, commit bbef9474fa52d9aba06eeede52558fc5ccb762dd, merged
1/31/2018.

Hopefully this now makes my answer complete enough, and again, apologies for
the delay.

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[Bug 104932] Hang when running X11/Wayland on GFX8/Polaris10/Ellesmere/Rx-480-8GiB (agd5f a5592a6df4f45a018b48f252ad1c498e683e9b9d, hwentland's DC-Patches-Jan-31-2018.mbox applied)

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https://bugs.freedesktop.org/show_bug.cgi?id=104932

--- Comment #7 from Robin Kauffman <robink@creosotehill.org> ---
(In reply to Michel Dänzer from comment #4)
> Which versions of Mesa & LLVM are you using?

I should also add that LLVM & Clang were compiled/installed *prior* to merging
libclc & Mesa (probably prior to libdrm as well, but in full honesty I can't
remember), and that libdrm, libclc & Mesa were merged in that order.

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[Bug 104932] Hang when running X11/Wayland on GFX8/Polaris10/Ellesmere/Rx-480-8GiB (agd5f a5592a6df4f45a018b48f252ad1c498e683e9b9d, hwentland's DC-Patches-Jan-31-2018.mbox applied)

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https://bugs.freedesktop.org/show_bug.cgi?id=104932

Robin Kauffman <robink@creosotehill.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |WORKSFORME

--- Comment #8 from Robin Kauffman <robink@creosotehill.org> ---
Hi Again-
    Well, after (repeatedly) breaking the Law of Sysadminning (changing more
than one thing at a time), and upgrading userland (including, but sadly not
limited to, the 3D stack) as well as the kernel, I have a working desktop, and
what little I can divine from where I ended up is that it may well *not* have
been RadeonSI/libdrm/AMDGPU at fault to begin with (almost labeled the
resolution NOTOURBUG, but the probability that there might have been some
slight issue with things actually pertaining to the RadeonSI/AMDGPU graphics
driver is to my mind nonzero, even if scant).
    I unfortunately neglected to bisect the kernel driver (or parts of
userland) to see if I could get things working by going back in time and seeing
if there was some commit somewhere that broke things (at least for my
already-rickety userland).  Such a commit may well exist, but going back to try
to find it would be a lengthy endeavor, and given that things more-or-less work
for me now, the motivation for doing so has all but dried up.
    If someone wants to follow-up with a likely cause for the kernel complaint
I *did* see earlier, by all means do so, but I have a sneaking suspicion that I
likely made things Not Work by having a haphazard and semi-out-of-date userland
(in this case, *outside* of libdrm/LLVM/Clang/Mesa/etc).
    Thanks, and apologies for any time sunk on anyone else's behalf trying to
suss this one out.

        -Robin K.

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