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[Bug 1084767] 3D & games produce periodic GPU crashes (Radeon R7 370)
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Sun, 01 Apr 2018 19:53:06 +0000
  • Message-id: <bug-1084767-21960-Ew4GDt3X7j@http.bugzilla.opensuse.org/>
http://bugzilla.opensuse.org/show_bug.cgi?id=1084767
http://bugzilla.opensuse.org/show_bug.cgi?id=1084767#c14

--- Comment #14 from Mircea Kitsune <sonichedgehog_hyperblast00@xxxxxxxxx> ---
I'm still struggling to debug this. The more I see the more my jaw drops.

First of all, the rule that disabling anti-aliasing decreases the frequency of
the freeze (see the comments above) was just patched out: AA no longer has any
effect either, it always freezes between 0 and 30 minutes now.

I ran the following new tests in Xonotic, none of which had any influence:

- Running with the following environment variable set:
R600_DEBUG=checkir,precompile,nooptvariant,nodpbb,nodfsm,nodma,nowc,nooutoforder,nohyperz,norbplus,no2d,notiling,nodcc,nodccclear,nodccfb,nodccmsaa

- Disabling all shaders, even turning off OpenGL 2.0 support entirely.

- Resetting the entire BIOS to its failsafe defaults, making sure that neither
overclocking nor any other settings are involved.

- Running under both an X11 and Wayland session (Plasma). In Wayland it crashes
instantly so it's even worse.

- Verified that this occurs on both the "radeon" and "amdgpu" modules, meaning
the video driver makes no difference either.

It's clear to me at this point that this is the work of a professional: The
code causing the crash is carefully maintained and injected into my system. If
this was just a bug, at least one of the countless things I tried would have
affected it somehow, it's impossible for a randomly occurring bug to survive so
many different settings and environments... the issue instead is adaptive, so
that the moment I find and disable one implementation another is activated
within minutes to keep the crashes going. I imagine the objective is to block
the user from finding a solution and ultimately censor them from using specific
programs. I find it unbelievable that someone out there is actively doing this.

Please help me get to the bottom of this: The crash clearly acts by simulating
some sort of bug, so there must be a vulnerability deep in the system which
hidden code is exploiting. I offered a lot of test data on this report: If the
developers read this, please let me know what to try next!

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