Bug#887139: d-i daily 2018-01-14 amd64 damages UEFI setup on Fujitsu Lifebook AH532
On Sun, 14 Jan 2018 13:38:11 +0100 Karsten Merker <merker@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/
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