[Bug 86548] [regression] Screen tears on xrandr orientation inverted

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86548

--- Comment #6 from Jeff Cook <jeff at deserettechnology.com> ---
I believe FBC is disabled. Here's what I found in /sys:

jeff at jeff-yoga:~$ sudo cat /sys/kernel/debug/dri/0/i915_fbc_status
FBC disabled: disabled per chip default
jeff at jeff-yoga:~$ sudo cat /sys/kernel/debug/dri/64/i915_fbc_status
FBC disabled: disabled per chip default

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