Red Hat hp-repsetup tool - Getting "Error opening /dev/hpuefi: No such file or directory"

[Aaron460]

Running RHEL 8.10 (kernel 4.18.0-553.80.1) on a Z2 G9, attempting to change Bios settings with the hp-repsetup` tool. I've followed all the instructions to build the RPM and install it into /opt/hp/hp-flash but when I try to run the utility I get the error in the title. I'm able to run `modprobe hpuefi` with no error, so it seems like the kernel module is loaded, but maybe the installation process is not creating the /dev files it is supposed to? I haven't been able to find anything online as to what I might be doing wrong.

[resistencia · Accepted solution]

Hi @Aaron460 

See this link and check the last line.

Update HP BIOS settings in Linux – Valentijn Sessink

sudo mknod -m 644 /dev/hpuefi c `grep hpuefi /proc/devices|cut -d ' ' -f 1` 0

[Aaron460]

Thanks a ton! That last command fixed the error.  I attempted to use a .bin file generated from a Windows machine for the -cspwdfile parameter but I get "Admin password was not updated: (Access Denied)". Do I need to generate another .bin file on this current machine in order to do that? And if so, is there a way to save the current BIOS password in a .bin file similar to the HPQPswd.exe?

[Aaron460]

Should also mention it is possible to set the admin password if using `-p`, but obviously not the ideal solution to have it in plaintext so I would prefer to use a .bin

[resistencia]

I'm not sure, but check the manual under the subtitle
BIOS Flashing

HP_Linux_Tools_Users_Guide.pdf

If a BIOS password is set on the system, it will need to be supplied on the command line using the -p option for changes to be made. For example: /opt/hp/hp-flash/hp-flash -p