Ok, so here is the workaround... while we expect for a solution.
Considering my xorg file above, I added in "programs at session startup", the following command:
xrandr --output default --mode 1280x1024
This uses the Modeline as defined in the xorg.conf file, and thus now the xorg log shows:
...
[ 3836.645] (II) No input driver specified, ignoring this device. [ 3836.645] (II) This device may have been added with another device file.
[ 3836.994] (II) NVIDIA(0): Setting mode "1280x1024_60" [ 3842.916] (II) NVIDIA(0): Setting mode "1280x1024_85+0+0"
[ 3844.405] (II) XKB: reuse xkmfile /var/lib/xkb/server-A49B0D9CDBFA4DEADEE9D72BD5A2170E273505F0.xkm
As you can see, still the faulty setting to 60hz followed by the setting to 85hz due to the session startup program xrandr
Ok, so here is the workaround... while we expect for a solution.
Considering my xorg file above, I added in "programs at session startup", the following command:
xrandr --output default --mode 1280x1024
This uses the Modeline as defined in the xorg.conf file, and thus now the xorg log shows:
...
[ 3836.645] (II) No input driver specified, ignoring this device.
[ 3836.645] (II) This device may have been added with another device file.
[ 3836.994] (II) NVIDIA(0): Setting mode "1280x1024_60"
[ 3842.916] (II) NVIDIA(0): Setting mode "1280x1024_85+0+0"
[ 3844.405] (II) XKB: reuse xkmfile /var/lib/ xkb/server- A49B0D9CDBFA4DE ADEE9D72BD5A217 0E273505F0. xkm
As you can see, still the faulty setting to 60hz followed by the setting to 85hz due to the session startup program xrandr