[Bug 89388] [all bisected]system hang and BUG: unable to handle kernel NULL pointer dereference at 0000000000000084 when kill X

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89388

--- Comment #5 from Michael Leuchtenburg <michael at slashhome.org> ---
I get a very similar crash to this on BDW hardware when modeswitching; changing
to console results in an oops in the same function. gdb claims the IP was in
the line changed in fd2d613,     p->pri.bytes_per_pixel =
crtc->primary->state->fb->bits_per_pixel / 8;
so I suspect it's the same bug with a different trigger. If I revert the patch,
I am able to change to console without a crash, though the mode in the console
is not correct and causes the text to flicker in three locations.

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