[Bug 79311] Call trace originating from i915 referencing intel_wait_for_vblank()

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=79311

--- Comment #24 from Alan Bartlett <ajb at elrepo.org> ---
(In reply to Ville Syrjala from comment #22)
> Created attachment 149291 [details]
> [PATCH] drm/i915: Wait for vblank before enabling the TV encoder
> 
> Given the bisect result this should get the old behaviour back, but just for
> the TV encoder. It doesn't really make any sense to me, but let's try it.

Applying this patch to the linux-3.17-rc3 sources and building results in a
kernel that is good.

[Duo2 ~] uname -r
3.17.0-0.rc3.149291.patch.el7.elrepo.x86_64
[Duo2 ~] dmesg | grep -Ei 'cut here|error|warning'
[    0.000000] ACPI BIOS Warning (bug): 32/64X length mismatch in
FADT/Gpe0Block: 128/64 (20140724/tbfadt-618)
[    0.567754] i8042: Warning: Keylock active
[Duo2 ~]

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