Bug#969944: debian-installer: Screen is corrupted with boot parameter VGA=788

[ng]

Hi,  I am currently using: debian-bookworm-DI-rc1-amd64-netinst and I am 
currently having this bug.

If I change the boot parameter 'VGA=788' to 'VGA='  it works correctly.

AMD Ryzen 5 3500U
Thinkpad E495
debian-bookworm-DI-rc1