No nofb

[BlueSkyKDM]

Hi, GUYS
I'm trying to do a GPU passthrough, but I get an "/usr/sbin/grub-mkconfig: 10: /etc/default/grub: nofb: not found" and can't do it.
I am running Proxmox 7.3-6. on an "HP Z2 SFF G4 Workstation"
What should I do?

 

[leesteken]

What is the output of cat /etc/default/grub? It looks like you make a typo in that file. Also, are you sure your system uses GRUB and not systemd-boot?

 

[BlueSkyKDM]

I think "grub" is installed. because The output of bootctl is "systemd-boot is not installed on ESP.
The output of bootctl is

# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
# info -f grub -n 'Simple configuration'

GRUB_DEFAULT=0
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
#GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on iommu=pt pcie_acs_override=downstream,multifunction nofb nomodeset video=vesafbff video=efifbff video=simplefbff"
GRUB_CMDLINE_LINUX_DEFAULT="GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on iommu=pt pcie_acs_override=downstream,multifunction nofb nomodeset video=vesafbff,efifbff""

# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"

# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
#GRUB_GFXMODE=640x480

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true

# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"

 

[leesteken]

GRUB_CMDLINE_LINUX_DEFAULT="GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on iommu=pt pcie_acs_override=downstream,multifunction nofb nomodeset video=vesafbff,efifbff""

Look at the end of that line: this is at least one place where there are two double quotes (which is incorrect because it is one double quote too much).
Also, nofb nomodeset video=vesafb:off,efifb:off is incorrect and no longer works since Proxmox kernel 5.15. If you want to passthrough a GPU that is used during boot of the Proxmox system, use this work-around.