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I experience this problem on my ThinkPad T400 (on my good old T42 everything seems to work fine).
I've been using an USB TV tuner Hauppauge HVR-900 based on em28xx for a long time. With my old wired mouse everything worked correctly. Then I decided to buy a new, wireless mouse: a Logitech M195.
If I start the notebook with the mouse receiver unplugged, first connect the tuner and then -- the mouse receiver -- no problems occur, it's OK.
If the USB receiver is the first USB device plugged I cannot get the tuner functioning. The log messages when plugging the tuner are quite confusing:
Mar 2 19:13:26 localhost kernel: [ 20.553451] usb 1-1: new full speed USB device number 2 using uhci_hcd
Mar 2 19:13:26 localhost kernel: [ 20.686742] usb 1-1: not running at top speed; connect to a high speed hub
Mar 2 19:13:26 localhost kernel: [ 20.770598] Linux media interface: v0.10
Mar 2 19:13:26 localhost kernel: [ 20.800263] Linux video capture interface: v2.00
Mar 2 19:13:26 localhost kernel: [ 20.833208] IR NEC protocol handler initialized
Mar 2 19:13:26 localhost kernel: [ 20.876704] IR RC5(x) protocol handler initialized
Mar 2 19:13:26 localhost kernel: [ 20.877590] em28xx: New device WinTV HVR-900 @ 12 Mbps (2040:6502, interface 0, class 0)
Mar 2 19:13:26 localhost kernel: [ 20.877597] em28xx: Device initialization failed.
Mar 2 19:13:26 localhost kernel: [ 20.877601] em28xx: Device must be connected to a high-speed USB 2.0 port.
It seems like plugging the M195 receiver as a first device switches my USB ports to some low-speed (USB1?) mode..? Interesting that unplugging the receiver and restarting the notebook doesn't help. I have to power it off and then turn on.
Any explanation, help or info on debugging welcome!
Best regards,
/m
Last edited by quayasil (2012-03-02 18:42:47)
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BTW: Can anyone explain the log messages:
"Warning! ehci_hcd should always be loaded before uhci_hcd and ohci_hcd, not after"
?
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