[Nouveau] [Bug 54587] [NV1F] Flickering screen on Geforce 4

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=54587

--- Comment #34 from Patrick McMunn <doctorwhoguy at gmail.com> ---
I wonder if this bug may either be related to, or may actually be the same as,
bug 61537. I also have this same issue with a PC using an nVidia GeForce 4 MX
IGP, and I know that the monitor attached to it has a bad EDID. I suspect Vesa
may also have a monitor with a bad EDID; that would explain why his monitor's
resolution was not correctly detected by Xorg (see comment #12).

I applied the above patch to Linux 4.4.11 sources, recompiled my kernel, and
rebooted. The problem is not completely fixed, but it is noticeably improved.
Whereas before the whole screen would intermittently jump, now there are simply
random flashes of horizontal lines on random places on the screen. I generally
run this box as a light-duty server, so I mainly ssh into it from my desktop,
and I didn't boot into a GUI for testing. I just booted it and observed the
text console.

I wouldn't consider this patch a fix, but it is perhaps a mitigation. In any
case, since I suspect that this may actually be the same as bug 61537, it would
probably be wise to discuss with other devs, per Martin Peres' comment, before
submitting any changes to the tree.

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