Arch Linux

F1y3r

Member

Registered: 2007-09-28

Posts: 61

Coldplugging problem with ohci_hcd

Module ohci_hcd is acting very odd. It's used by my mouse and my keyboard. Half the time, my mouse is not detected at all, it's simply not mentioned at all in dmesg (when booting using the hid.debug=1 grub parameter) and the rest of the time, mouse is detected and works perfectly fine. Whenever mouse is not detected, unplugging and replugging it fixes the problem. The problem only occurs only after shutdown, but not reboot. Maybe ohci_hcd messes up mouse pairing procedure when keyboard is detected at the exact same time. Working half the time does kind of make sense, either the mouse is paired first or the keyboard detected. I tried to unload ohci_hcd and both keyboard and mouse stopped working. There's nothing on the right of it in the lsmod output and it's only mentioned in the left part of the modules.dep. I wanted to load it later, from the openbox autostart file. Unfortunately no matter what I put in the rc.conf modules list or blacklist file, it still manages to start much sooner than I intended.

How could this module start if it's blacklisted, not loaded manually and has no dependencies? How can I make it load later? I can follow a tutorial so I think I could compile a kernel if it would provide additional debugging information.

Note that this keyboard has multimedia keys so there are two input devices for it.

lsusb for both: http://pastebin.com/vEzz0hXS
full dmesg with both working: http://pastebin.com/Wukjeuad
relevant bits for both working (grep -i 'logitech\|holtek\|ohci\|usb'): http://pastebin.com/cC7GfYwN
lsmod: http://pastebin.com/heFJh76w

full dmesg without mouse: http://pastebin.com/LLuQ919Y
same relevant bits without mouse: http://pastebin.com/201jQ5m8
modules no mouse: http://pastebin.com/CXmyZ4tH

rc.conf:
<code>
MODULES=(lp parport parport_pc)
</code>

/etc/modprobe.d/blacklist.conf: http://pastebin.com/BpWUuP4n

Mouse is Logitech LX5 and keyboard uses Holtek controller.