[Nouveau] [Bug 56461] NV11 black screen & kernel hang on loading nouveaufb

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=56461

--- Comment #25 from Chris Paulson-Ellis <chris at edesix.com> ---
I've been bisecting and it appears that there are at least 2 further
regressions...

At one point in the bisection, the display goes from working to visible, but
with what look like hsync problems. I can see all the lines on the display, but
each line is shifting horizontally by about 16 pixels or so - giving a
shifting, fuzzy picture.

I've pinned this problem down to the following commit:

486a45c2  drm/nouveau/i2c: do parsing of i2c-related vbios info in
nouveau_i2c.c

There are no differences in the console output between this commit and its
working parent commit.

Much later in the bisection, this hsync problem is replaced with the
fade-to-black problem I described before. I haven't finished bisecting this
yet, but will continue.

Chris.

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