Another victim of the Manjaro 20 update. I delayed as long as possible, having read the litany of problems associated with this update, but today I updated my secondary Manjaro machine before rebooting my primary workhorse.
I had not downloaded the 20 update before. I set the update in motion using the gui updater (via Remmina, as usual). I kept an eye on it but towards the end I was distracted for a moment. When I looked back the machine was no longer visible in Remmina so I reloaded it. All the workspaces had been wiped as though by a reboot, but I think the delay was not sufficient for a true reboot. I checked for further uodates but there were none so I re-started the computer via the Log Out option. Mistake. The machine appeared to reboot but then began a noisy several minutes (high fan activity) and I could not regain access via Remmina.
Adding a monitor showed the machine was in the boot selection menu. Adding a keyboard, I selected the most likely option and got the message that it could not find linuz-4.19 - install a kernel! I tried the other options (four in all) and got the same response. I tried the editor, as advised in several of the posts hereabouts, and changed the kernel number through all the likely ones, taking my primary machine’s grub setup as example. I also tried modifying the disk number (it showed hd1 where my primary machine was hd0. No differrence. Each time it showed the previous error on reboot with alterations to the kernel number as appropriate.
Following other instructions, I tried to boot from the original USB installation stick (Manjaro 17) but it persistently came up as a failed grub for v20. I can think of no reason why it could not boot from the USB device (BIOS is set to read the USB first).
A couple of other pertinent observations:
I had the backup drive connected during update (1Tb USB drive). After the failure became obvious I removed it. Looking at it on another machine, it seems intact and working.
I updated the primary machine in the same way but have not yet rebooted it, nor did it reboot itself.
I suspect, from the secondary machine’s apparent auto reboot, that the update installation did not in fact complete.
If I could boot from the USB I could probably reinstall, or at least try to fix it, but the drive failure is a puzzle in itself. I have rearranged the priorities and returned 1st Boot Drive to Removable but no difference.
Was there a BIOS or CPU patch included in the 20 update? BIOS is Megatrends copyrighted 2011. The CPU info I have is: 6 x AMD FX 6200
I have spent several hours trying to get it to boot, plus reading a large number of posts plus the wiki (which gave no relevant solution).
Any suggestions, please?