[Bug 55843] Re: Erratic keyboard repeat

imanauto ian at imanauto.com.au
Sat Feb 23 13:07:11 UTC 2008


I recently upgraded my home server from Ubuntu 5.10 to Ubuntu 7.10. I
had this exact problem after upgrading. The erratic keyboard repeat
would also occur after booting from the installation CD.

There were a lot of kernel log messages indicating a problem with USB.
example :

Feb 22 01:20:12 imanserver1 kernel: [  257.668386] usb 3-1.1: reset low speed USB device using ohci_hcd and address 3
Feb 22 01:20:13 imanserver1 kernel: [  258.239408] usb 3-1.2: reset low speed USB device using ohci_hcd and address 4
Feb 22 01:20:14 imanserver1 kernel: [  259.621041] usb 3-1.1: reset low speed USB device using ohci_hcd and address 3
Feb 22 01:20:15 imanserver1 kernel: [  260.295885] usb 3-1.2: reset low speed USB device using ohci_hcd and address 4
Feb 22 01:20:16 imanserver1 kernel: [  261.409977] usb 3-1.1: reset low speed USB device using ohci_hcd and address 3
Feb 22 01:20:17 imanserver1 kernel: [  262.324410] usb 3-1.2: reset low speed USB device using ohci_hcd and address 4

After tearing my hair out for a while, I found that I could fix the
problem by editing /etc/modprobe.d/blacklist and adding the line
"blacklist usbhid" and uncommenting the "blacklist usbmouse" and
"blacklist usbkbd" lines. I had to do this by booting from another linux
CD as the erratic repeat problem is so severe as to be completely
unusable. This fix wasn't perfect though, as the occasional keypress is
now ignored - may be an unrelated problem with the usbkbd module.

So the usbhid module seems to have a particular problem with my usb
keyboard & mouse. The peculiar thing about them is that they are
connected via a KVM switch (ATEN CS-62U), which attaches both keyboard
and mouse via the one USB port. No problems with this setup when running
Ubuntu 5.10, only after moving to 7.10.

Apart from this problem, the upgrade went smoothly. The issue with some
keypress events being ignored is annoying though - i'll continue to look
for a solution to that.

-- 
Erratic keyboard repeat
https://bugs.launchpad.net/bugs/55843
You received this bug notification because you are a member of Kernel
Bugs, which is subscribed to linux-meta in ubuntu.




More information about the kernel-bugs mailing list