USB devices not recognised after startup

cjm1989 · 11-26-2012, 06:52 AM

Every time I start the computer up the only two USB devices attached to the desktop (a wireless antenna and a mouse) are not recognised by the computer.

If I unplug them and plug them back in, it works again but this hardly isn't a long term solution.

Any help would be greatly appreciated!!!

markush · 11-26-2012, 08:06 AM

Hello cjm1989, welcome to LQ,

which OS are you using? does it work with Windows and not with Linux on the same computer? Which distribution are you using? Do both devices work correctly at another computer?

Markus

cjm1989 · 11-26-2012, 08:09 AM

It's using Ubuntu 11.10 and I believe the desktop only has Linux on it and yes both appear to work fine on my Windows based laptop after startup

malekmustaq · 11-26-2012, 08:26 AM

Quote:

Every time I start the computer up the only two USB devices attached to the desktop (a wireless antenna ...

Not surprising since wireless devices like modems have less support to Gnu/Linux. But if you are talking about usb bluetooth dongle there should be no problem recognizing that.

Quote:

and a mouse) are not recognised by the computer.

Mice are easily recognized. Check your /etc/init.d if it has something about the mouse make it executable; yet, even without it the kernel should have no problem shaking hands with generally all basic mice devices.

cjm1989 · 11-26-2012, 08:43 AM

They both have worked in the past which is odd
Sorry - I'm not really Linux savy how do I access /etc/init.d

markush · 11-26-2012, 09:10 AM

Quote:

Originally Posted by cjm1989

They both have worked in the past which is odd
...

and what happened in the meantime? did you upgrade? change the distribution? change the kernel? reconfigure your system?

Markus

cjm1989 · 11-26-2012, 09:22 AM

No knowledge of anything changing
Possibly could be an update?
I do remember trying to look for a way to change the refresh rate, which I failed to find, as the screen flickers terribly.

markush · 11-26-2012, 09:34 AM

If you mean the refresh rate of the screen, this should have nothing to do with any USB devices.

Could you please after rebooting but before pluging the mouse and wireless device off and in execute the lsusb command

Code:

sudo lsusb

and then after pluging both devices off and on execute lsusb once again. Pipe it both times into a textfile

Code:

sudo lsusb > before.txt

and

Code:

sudo lsusb > after.txt

respectively. The please post both files here.

Markus

cjm1989 · 11-26-2012, 10:12 AM

Can I do this without a mouse being plugged in and if so how do I execute these codes?

markush · 11-26-2012, 10:13 AM

In a terminal. You should check how you can open a terminal without a mouse. This depends on your windowmanager. Does the "Windows" key work on your system?

Markus

malekmustaq · 11-26-2012, 09:47 PM

Quote:

Any help would be greatly appreciated!!!

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