On Sun, 14 Jan 2018 13:38:11 +0100 Karsten Merker <mer...@debian.org> wrote:
Machine: Fujitsu Lifebook AH532, first version (with BIOS version 1.09) [...] How can one bring the NVRAM back into a sane state that allows getting into the setup and booting from external devices?
I personally had luck with doing a CMOS-reset (shorting the CL1_CL2 test point under the RAM slot while the machine is powered on is easier than uncovering the actual battery) to restore the device-based options in the boot menu, and then using the Fujitsu-provided BIOS flash utilities [1] (via a bootable FreeDOS USB) to restore the BIOS Setup option. If you are feeling adventurous (or the CMOS-reset-and-BIOS-update option does not work), you may want to try the small program I have written [2] (which is supposed to restore all relevant entries from within a running Linux system) instead. Please do note the disclaimer and supported configurations though. [1] https://support.ts.fujitsu.com/ [2] https://github.com/timschumi/ah532-biostools/
