Public bug reported:
I observed a very strange behaviour and have not found a solution so
far:
Legacy BIOS
GRUB2 (2.02-2ubuntu8.13)
Nvidia Quadro K420
ASUS PB27U 4k monitor connected via display port
The monitor allows to select DP1.1 (30Hz@4k) and DP1.2 (60Hz@4k) via
OSD. With DP1.1 computer boots up normally but it would be required to
later change manually to 60Hz.
With DP1.2 the BIOS messages (POST) are seen, then a short cursor blink
in the left upper corner and the systems halts with a blank screen (I
can exclude that grub continues with the boot up process since I cannot
ping the machine).
I tried:
GRUB_GFXMODE "1024*768*8"
and GRUB_TERMINAl "console"
reinstalling MBR
Always the same picture: DP1.1 no problem, DP1.2 no GRUB.
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
** Tags: dp fails grub2 loading nvidia
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https://bugs.launchpad.net/bugs/1853735
Title:
grub2 fails to load with DP1.2 (but not DP1.1)
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