Instead of being forced to re-boot my OS in order to have a different plugged-in USB device recognized, I'd like to know how to clear whatever so I don't have to do the re-boot. Here are the details:
Earlier this year I acquired a used, older IBM ThinkCentre desktop tower, machine 8143-2EU. It was built ~ 2004 and has a P4 cpu (64 bit). It came with WinXP loaded as sole OS. Before I wiped the WinXP and installed MEPIS 11, I tested the various USB ports. When I plugged in any USB device, the WinXP OS recognized the plugged-in USB device. But I wiped the WinXP, updated the IBM BIOS and installed MEPIS 11 (32 bit because MEPIS 11 only works with one variety of a 64 bit P4 cpu-- this desktop didn't have that particular variety). With the MEPIS 11 installed, I quickly found that no plugged-in USB device is recognized by the OS until
I run in konsole:
Running that wakes up the OS and the plugged-in USB device is recognized and I can use it. But only 1 plugged-in USB device can be recognized and used at one time.
To use another one, I first safely remove the recognized, plugged-in USB device and then I'm forced to re-boot the computer so that something is cleared and another USB device can be plugged in after the re-boot. If I don't do the re-boot and have another USB device plugged in, running lsusb still shows only the first USB device that was plugged in and recognized in a session.
In order to use another plugged-in USB device without re-booting, what command can I run to clear whatever so that I don't have to do the re-boot?
Incidentally, when I quickly discovered this problem earlier this year after installing MEPIS 11, I asked in various Linux forums how to correct the MEPIS-OS-failing-to-recognize-plugged-in-USB-devices problem but never found an answer. My theory is that something changed when I updated the IBM BIOS after installing MEPIS 11 (32 bit). I've examined the BIOS several times and see nothing to fix this problem.
An odd thing happens but rarely: a different USB device that's been plugged in is finally recognized by the OS but it can take many minutes before this happens. Why?
There are 2 USB ports on the front of the desktop tower and 6 in the back.