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Old 03-29-2006, 10:23 PM   #1
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Registered: Feb 2006
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USB KVM stops working at linux boot

Hi there,
I have a avocent switchview MM2 USB2.0 plugged to my wireless logitech mouse keyboard combo.

My mouse and my keyboard are working perfectly when they are plugged directly to my linux box.
When I plug my KVM in my linux box, I am able to surf in the BIOS settings and change them with my keyboard but once I boot linux, the keyboard stops responding. I tried this with Fedora 4, Fedora 5 and also knoppix and each has the same behavior.

I have a led on my KVM that indicates when the computer stops responding to a USB signal. When I look at which stage the led is flashing:
FC4-> /sbin/loader
FC5-> starting udev
Knoppix-> init stage

Also, If it could be of any interest for you, I have this output in my /var/log/messages when I plug/unplug the kvm (with the mouse linked to it) and when I plug/unplug the mouse/keyboard only without the kvm.

1)plug kvm (with mouse/keyboard plugged to the KVM)
Mar 10 10:36:21 mattlinux kernel: usb 1-5: USB disconnect, address 4
Mar 10 10:36:37 mattlinux kernel: usb 1-6: new high speed USB device using ehci_hcd and address 5
Mar 10 10:36:37 mattlinux kernel: hub 1-6:1.0: USB hub found
Mar 10 10:36:37 mattlinux kernel: hub 1-6:1.0: 3 ports detected

2) plug mouse/keyboard
Mar 10 10:38:20 mattlinux kernel: ohci_hcd 0000:00:02.0: wakeup
Mar 10 10:38:21 mattlinux kernel: usb 2-1: new low speed USB device using ohci_hcd and address 2
Mar 10 10:38:21 mattlinux kernel: input: Logitech USB Receiver as /class/input/input2
Mar 10 10:38:21 mattlinux kernel: input: USB HID v1.10 Keyboard [Logitech USB Receiver] on usb-0000:00:02.0-1
Mar 10 10:38:21 mattlinux kernel: input: Logitech USB Receiver as /class/input/input3
Mar 10 10:38:21 mattlinux kernel: input: USB HID v1.10 Mouse [Logitech USB Receiver] on usb-0000:00:02.0-1

Could it be related to the kernel? Do I need to set special features in the kernel then??

If you could help me to solve my problem, I will greatly appreciate!

Old 03-29-2006, 10:49 PM   #2
Registered: Feb 2006
Location: Canada
Distribution: OpenSuSe 10.2 (Home and Laptop) CentOS 5.0 (Server)
Posts: 171

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linux isnt always boot and such freindly with USB espeicaly foregin devices.

linux likes to have some sort ofgrasp of a device before big kernel thigns pop in and a KVM isnt as easy as a keyboard and mouse. the mosue and keyboard have there data feed into the OS by the keyboard so the keybaord using its "legacy/usb support" makes things freindly for linux, but that KVM isnt so freindly......i odn have a single solution or idea, but i do wiht you luck
Old 03-30-2006, 12:20 PM   #3
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Registered: Feb 2006
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Thanks for the reply but I though that maybe a kernel guru could help me to tweak it.



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