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Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?


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Old 02-08-2005, 11:43 AM   #1
Registered: Sep 2004
Location: Old York, North Yorks.
Distribution: Debian 7 (mainly)
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Question Erratic USB

Wishing to save a bit of desk space, I bought a USB sharing hub to allow a USB keyboard and mouse (among other peripherals) to be shared between a Mac and a PC running SuSE 9.1 /Win 98 (Dual Boot). A couple of problems have cropped up on the PC:

1. When the PC is booted from cold, both the keyboard and mouse are recognised by SuSE. However, if I restart the PC (either from the logout menu or with the reset button), they stop working.

2. The keyboard is recognised on a cold start by BIOS, and I can enter setup and make changes. However, it ceases to work during the boot-process and only starts working again at login. This means that unless I have a PS2 keyboard connected I cannot select any other boot options in GRUB.

In neither case does dis- & re-connecting the keyboard/mouse or toggling them between the two computers cause them to be recognised once they have stopped working. I don't believe that the hub is the problem, as the Mac is perfectly happy with the situation.

The motherboard is an Abit NF7-M (nForce 2 chipset). I have attached a second pair of USB ports to one of the sets of headers on the motherboard, but I get the same result from the pair on the mobo back-panel (except that any USB device connected here knocks out the PCI network card as well).

Any ideas?
Old 02-13-2005, 08:17 PM   #2
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Registered: Oct 2003
Location: Western Australia
Distribution: Icewm
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LQ user explorer says try this
Try turning off ( or on if allready off ) PNP operating system option in the motherboard BIOS.
Also see if there is an option in the BIOS to turn off the PS2 keyboard and make sure USB is enabled.

other search suggests in bios

to say that appears you need to look in your bios and hopefully find options to stop pnp input and enable legacy usb support

can you advise any success and i maintain a howto on grub?


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