X220 i7 Bios 1.46 Linux Mint. USB3.0 problem

[ThinkCat]

Hi.

I landed a pair of X220 i7 with USB 3.0 ports from ebay which I've upgraded. Both are v nice but one of them has problems recognizing when a thumb drive is plugged into the USB 3.0 port. If the thumb drive is present when the computer boots up then it is recognized and mounted however if I remove the drive and plug it back in again it does not reappear. The same happens if I log out and back in again. The other two USB 2.0 ports behave as expected as do the pair, USB 3.0, I have added via the express card. The SD card slot also behaves as expected.

I'm hoping to gift these to neighbours, They are really for their children who are about to go to big school and hopefully later in life. As such I would like them to be perfect so one of them having a clunky USB 3.0 is a bit of a downer.

Has anyone seen such behaviour and found a fix for it? I'm hoping it's me being my usual dumb self and there might be an aha! moment.

Many Thanks.

[axur-delmeria]

Do you experience this on battery, or while plugged in? I remember a similar issue with the USB 3.0 port when on battery. Unfortunately I cannot check anymore as my X220 i7 died last year.

[ThinkCat]

Sorry to hear of your loss.

Yay! Monster and thank you for your memories. That was the solution. ISTR it working sometimes and then when I was checking them out prior to handing them over it started playing up on one but not the other. Then I was trying to troubleshoot, not on AC, on both and they both started playing up so I got a bit flummoxed. Being me I did not spot the common denominator. I shall have a poke about in the Bios to see if there is a setting that makes it work on battery. There is some mention of power always on possibly when when on battery but I think that might just apply to the yellow USB on the right otherwise I'm happy with that being a fix.

Thank you very much.