[Bug 111805] Constant "Resetting rcs0 for hang on rcs0" and machine lockup

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111805

--- Comment #34 from Kenneth C <kenny at panix.com> ---
(In reply to Lakshmi from comment #33)

> Kenneth, Do you mean to say the issue is not seen on Linus' tip?

No that's not what I'm saying, please re-read the comments carefully.

Linus' tip has the drm-next of mid-September pushed to it in commit
574cc4539762; it was this commit that has rendered i915 DRM completely
hang-ridden and unstable for me and others. My instructions above show how to
UNMERGE the drm-next changes so that if someone needs to run Linus' tip (or
several released kernels) for whatever upstream benefit yet go back to the
working DRM/i915.

Apparently you guys were warned of this issue regularly occurring by what
appears to be an Intel Mesa(?) developer, and he'd even bisected it to a range
of commits: https://bugs.freedesktop.org/show_bug.cgi?id=111385#c12

... and while no resolution to that bug was given, and apparently easily
reproducible, yet this was merged into the Linux tree. Those commits must be in
Intel-local repos, as I can't see those commits in any git repo I have.

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