[Bug 295940] x11/nvidia-driver-580-580.159.04, x11/nvidia-kmod-580.159.04.1500068 scrambled screen

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=295940

--- Comment #5 from Tomoaki AOKI <[email protected]> ---
(In reply to Ludger Bolmerg from comment #4)
So, can you try another display and/or display cable if you have any?
One possibility is that NVIDIA somehow changed binary only codes
that detects and initializes displays and it bites your monitor and/or cable.

In several recent updates for 595 series (Production Branch) and 610 series
(New Feature Branch) fixed issues for specific displays that were known
to be problematic. But what's changed are unclear, as NVIDIA haven't
provided specific page for upgrades after 580.142 and records no entry
in NVIDIA_Changelog file stored in the driver tarball of 580.159.04.

Another possible differences between us would be that I'm habitally
rebuilding x11-servers/xorg-server on upgrading any driver ports
including NVIDIA ones (not limited with NVIDIA ones, though) from the time
I've started using NVIDIA GPUs.

This was because, at the moment, x11/nvidia-driver and MESA GL drivers
(less frequently updated) installed samely named libraries at the same place,
causing install time race conditions, as libmap was NOT used (even not
yet available). So I needed to be sure x11/nvidia-driver to be installed
later than all MESA ports and x11-servers/xf86-server (it was before
Xorg superseded XFree86 on FreeBSD) certainly pick NVIDIA ones to avoid
strange breakages / slownesses at the era. And this still is my habit.

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