[Bug 43745] Re: Ubuntu corrupts real time clock on some dell laptops

[Klaus Reimer]

Ken, I think your problem is a different one. The "thorough" boot mode
made things worse for me. When the CMOS clock is corrupted then my D820
was still able to boot but the hardware clock was no longer working and
the counter in the grub boot menu was no longer counting down. The
"Time-of-day-clock stopped" error appears when the BIOS does a thorough
check once (which is also done when a BIOS setting is changed) while the
CMOS clock is corrupted. During my extreme-rebooting tests I had
activated Thorough boot mode so I can immediately see when the BIOS gets
corrupted. So at least for the Latitude D820 the "thorough" boot mode
does not fix the "time-of-day clock stopped" error. That's why I think
that your problem may have nothing to do with this bug. Or maybe your
laptop reacts totally different to this bug than other laptops.

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Ubuntu corrupts real time clock on some dell laptops
https://launchpad.net/bugs/43745