I updated to ubuntu 20.04 a couple of days back, and I noticed that it is not picking up USB disks when running on battery. When I plug-in power, the OS immediately picks up the USB drive.
I am running a Thinkpad T495 with AMD Ryzen 5 PRO 3500U w/ Radeon Vega Mobile Gfx. Kernel is,
Linux ThinkPad-T495 5.4.0-26-generic #30-Ubuntu SMP Mon Apr 20 16:58:30 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Any help on this is much appreciated.
UPDATE: The same applies to USB keyboard. It would only be detected while running on power and after connecting, I can disconnect A/C power and continue without a problem.
I am also having a similar issue regarding boot up, where the OS wouldn't boot up on battery.