[Bug 92740] Unclaimed register detected before writing to register 0x20a8

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92740

--- Comment #2 from Mika Kuoppala <mika.kuoppala at intel.com> ---
The keyword here is 'before'. When we enter the interrupt handling
there has already been unclaimed register access.

Please try with i915.mmio_debug=1000000. If you don't get any
'after' ones, then it is likely that some userspace lib does hardware access
without coordinating with driver.

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