Booting gets stuck at Manjaro logo with 5.8.6-1.
When I choose 5.7.19 -2 everything is ok.
But when installing updates I have seen information that 5.7.19 will not be supported any longer.
NOTE, 5.7.19 was the last maintenance release by Greg Kroah-Hartman.
[2020-09-09T11:01:09+0200] [ALPM-SCRIPTLET] This kernel series is now marked EOL (end of life).
[2020-09-09T11:01:09+0200] [ALPM-SCRIPTLET] It is recommend to move on to linux58 series.
Linux kernel development is not done by Manjaro, try to report the problem in the kernel bugtracker if it is not already filed there: https://bugzilla.kernel.org/
In the meantime stick with a working kernel, the latest LTS (Long Term Support) is perfectly fine.
For me it is with kernel 5.9 and Nvidia 450 drivers - the missing firmware for xhci error msg i get on every machine, but my nvidia (gtx970) machine just boots to a black screen. no log entries or something. but everything is fine with kernel 5.8 for me (fresh manjaro 20.1 kde install)
my intel laptop and intel nuc are working fine with kernel 5.9. seems like a nvidia problem, yes.