error: no server is specified / error: no suitable video mode found

[Bart Heideck]

Hello everyone,


a few weeks ago I converted my harddisk from MBR to GPT. In principle 
everything works nicely, booting via UEFI/grub etc. However shortly after POST 
grub shows two errors:

error: no server is specified
error: no suitable video mode found

What I've found on the internet: The first error seems to appear when using an 
encrypted filesystem and grub cannot access some files. However I'm using a 
single, unencrypted partition for Linux (Mint) with the /boot folder on / root. 
And booting, accessing the kernel, boot logo seems to work just fine.

The second error is said to be resolved by specifying "insmod all_video", 
according to this list. My grub.cfg file already contains this line:

------
function load_video {
  if [ x$feature_all_video_module = xy ]; then
    insmod all_video
  else
    insmod efi_gop
    insmod efi_uga
    insmod ieee1275_fb
    insmod vbe
    insmod vga
    insmod video_bochs
    insmod video_cirrus
  fi
}
------

So I'm now at loss here. I cannot find a proper documentation on this error and 
the "solutions" from the internet don't do it for me. Maybe soneone here can 
give me some advice on how to proceed?

Pleaselet me know if you need more information on the system or the configfiles.

Thankyou in advance for your support.
Bart