[Mesa-dev] [Bug 107001] hard system freeze with mesa 18.1.1 and 18.1.2 on AMD RX 580

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107001

            Bug ID: 107001
           Summary: hard system freeze with mesa 18.1.1 and 18.1.2 on AMD
                    RX 580
           Product: Mesa
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Other
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: claude at mathr.co.uk
        QA Contact: mesa-dev at lists.freedesktop.org

I'm running Debian Buster, quite happily with my AMD RX 580, until Monday when
I did a routine upgrade and got Mesa 18.1.1 and my system then became
unreliable, with randomly occuring hard freezes (sshd disconnects, nothing in
logs, no mouse cursor, no caps/numlock led function, even SysRq key combo
doesn't work).  Nothing particular seems to trigger it, the system is under
light load (firefox, thunderbird, a few terminals and other apps).

I tried 18.1.2 from unstable repository, it didn't fix the issue.  Uptime has
ranged between 10mins and 10 hours between lockups.

$ uname -a
Linux eiskaffee 4.16.0-2-amd64 #1 SMP Debian 4.16.12-1 (2018-05-27) x86_64
GNU/Linux
(I believe this version means amdgpu.dc=0 because I haven't set anything
manually)

$ sudo lspci | grep VGA
1d:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Ellesmere [Radeon RX 470/480] (rev e7)

$ clinfo | grep Device\ Name | head -n 1
  Device Name                                     Radeon RX 580 Series
(POLARIS10 / DRM 3.23.0 / 4.16.0-2-amd64, LLVM 6.0.0)

I downgraded to Mesa 18.0.5 and all seems fine again.

$ apt-cache policy mesa-common-dev 
mesa-common-dev:
  Installed: 18.0.5-1
  Candidate: 18.1.1-1
  Version table:
     18.1.2-1 500
        500 http://ftp.uk.debian.org/debian unstable/main amd64 Packages
     18.1.1-1 990
        990 http://ftp.uk.debian.org/debian buster/main amd64 Packages
 *** 18.0.5-1 100
        100 /var/lib/dpkg/status

I selected 1 package arbitrarily, all the corresponding Debian binary packages
for Mesa 18.0.5 are installed. The 18.0.5-1 is built and installed by me from
source following this recipe:

mkdir work
cd work
sudo apt-get build-dep mesa
git clone https://salsa.debian.org/xorg-team/lib/mesa.git
cd mesa
git checkout mesa-18.0.5-1
dpkg-buildpackage -us -uc
cd ..
sudo dpkg -i *.deb

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