[Bug 54226] [snb 3.5] stale semaphore sync seqno (typically as seen on bcs->rcs)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=54226

--- Comment #44 from Alberto González <luis6674 at yahoo.com> ---
I subscribed to this bug because I was seeing this hang too. It happened
randomly several times, without a specific cause or way to reproduce it.

This was around December, and it happened maybe 4-5 times along a month. The
GPU would hang with that error in dmesg, and everything continued to work,
though very slowly.

However, I must say that since then it didn't happen again for almost 2 months
maybe. I use Arch Linux, which means I always update to the latest stable
packages of everything, so it seems that for me it got solved at some point (or
at least much harder to reproduce).

This is an Ironlake / HD 2000 based Dell laptop. I did update the BIOS when I
found this bug report, but it didn't solve the problem, the hang happened after
updating it.

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