"EDID checksum is invalid"

[Linus Torvalds]

On Tue, Jan 6, 2015 at 11:32 PM, Daniel Vetter <daniel at ffwll.ch> wrote:
>
> Yeah if the edid probe fails userspace will get a hotplug and
> autodisable the output. With a failsafe X session (just a dumb
> terminal) we can avoid that to check that dpms on itself would work or
> whether the edid probe fail here is just indicative of more trouble.
> Also please boot with drm.debug=0xe, repro and grab dmesg, that might
> shed some more light on what's failing.

Here is an annotated attachment with the dpms off output witj drm.debug=0xe.

It turns out the real failure case doesn't seem to be when the bad
EDID happens. See my notes interspersed with the dmesg output.

                          Linus
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