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    SubjectRe: USB/DVB - Old Technotrend TT-connect S-2400 regression tracked down
    Alan Stern wrote:
    > On Sat, 23 May 2009, Pekka Enberg wrote:
    >
    >
    >> On Sat, May 23, 2009 at 12:32 AM, David <david@unsolicited.net> wrote:
    >>
    >>> I reported this DVB-S card breaking between 2.6.26 and 2.6.27. I've
    >>> finally had time to do some digging, and the regression is caused by:
    >>>
    >>> b963801164618e25fbdc0cd452ce49c3628b46c8 USB: ehci-hcd unlink speedups
    >>>
    >>> ..that was introduced in 2.6.27. Reverting this change in 2.6.29-rc5
    >>> makes the card work happily again.
    >>>
    >> [ Note: David meant 2.6.30-rc5 here. ]
    >>
    >> Thanks for doing the bisect!
    >>
    >> On Sat, May 23, 2009 at 12:32 AM, David <david@unsolicited.net> wrote:
    >>
    >>> I don't know enough about USB protocols to speculate on whether there
    >>> may be a better fix, but hopefully someone cleverer than me can get to
    >>> the bottom of the problem?
    >>>
    >
    > It's hard to see how that patch could cause any problems, provided the
    > hardware is working correctly. (There was a case where the hardware
    > was _not_ working as expected.) Is any more information available
    > about this failure?
    >
    Here's all I have. The device is a USB connected Technotrend TT-Connect
    S-2400. Support for this was added in kernel 2.6.26. When I came to
    upgrade my media PC beyond .26 the dmesg showed the following:-

    Media PC (32-bit - Nvidia chipset. kernel 2.6.27)

    19:13:18 s kernel: usb 1-3: new high speed USB device using ehci_hcd and
    address 6
    19:13:18 s kernel: usb 1-3: configuration #1 chosen from 1 choice
    19:13:18 s kernel: dvb-usb: found a 'Technotrend TT-connect S-2400' in
    cold state, will try to load a firmware
    19:13:18 s kernel: firmware: requesting dvb-usb-tt-s2400-01.fw
    19:13:18 s kernel: dvb-usb: downloading firmware from file
    'dvb-usb-tt-s2400-01.fw'
    19:13:18 s kernel: usb 1-3: USB disconnect, address 6
    19:13:18 s kernel: dvb-usb: generic DVB-USB module successfully
    deinitialized and disconnected.
    19:13:20 s kernel: usb 1-3: new high speed USB device using ehci_hcd and
    address 7
    19:13:20 s kernel: usb 1-3: configuration #1 chosen from 1 choice
    19:13:20 s kernel: dvb-usb: found a 'Technotrend TT-connect S-2400' in
    warm state.
    19:13:20 s kernel: dvb-usb: will pass the complete MPEG2 transport
    stream to the software demuxer.
    19:13:20 s kernel: DVB: registering new adapter (Technotrend TT-connect
    S-2400)
    19:13:20 s kernel: DVB: registering frontend 0 (Philips TDA10086 DVB-S)...
    19:13:23 s kernel: dvb-usb: recv bulk message failed: -110
    19:13:23 s kernel: ttusb2: there might have been an error during control
    message transfer. (rlen = 0, was 0)
    19:13:23 s kernel: dvb-usb: Technotrend TT-connect S-2400 successfully
    initialized and connected.

    The device times out. Reverting b963801164618e25fbdc0cd452ce49c3628b46c8
    causes it to work again

    19:09:53 s kernel: usb 1-3: new high speed USB device using ehci_hcd and
    address 5
    19:09:53 s kernel: usb 1-3: configuration #1 chosen from 1 choice
    19:09:58 s kernel: dvb-usb: found a 'Technotrend TT-connect S-2400' in
    cold state, will try to load a firmware
    19:09:58 s kernel: firmware: requesting dvb-usb-tt-s2400-01.fw
    19:09:59 s kernel: dvb-usb: downloading firmware from file
    'dvb-usb-tt-s2400-01.fw'
    19:09:59 s kernel: usb 1-3: USB disconnect, address 5
    19:09:59 s kernel: dvb-usb: generic DVB-USB module successfully
    deinitialized and disconnected.
    19:09:59 s kernel: usbcore: registered new interface driver dvb_usb_ttusb2
    19:10:00 s kernel: usb 1-3: new high speed USB device using ehci_hcd and
    address 6
    19:10:00 s kernel: usb 1-3: configuration #1 chosen from 1 choice
    19:10:01 s kernel: dvb-usb: found a 'Technotrend TT-connect S-2400' in
    warm state.
    19:10:01 s kernel: dvb-usb: will pass the complete MPEG2 transport
    stream to the software demuxer.
    19:10:01 s kernel: DVB: registering new adapter (Technotrend TT-connect
    S-2400)
    19:10:01 s kernel: DVB: registering frontend 3 (Philips TDA10086 DVB-S)...
    19:10:01 s kernel: dvb-usb: Technotrend TT-connect S-2400 successfully
    initialized and connected.

    My PC (64 bit - ATI chipset, using 2.6.30-rc5)

    [12044.364021] usb 4-10: new high speed USB device using ehci_hcd and
    address 5
    [12044.497561] usb 4-10: configuration #1 chosen from 1 choice
    [12044.881621] dvb-usb: found a 'Technotrend TT-connect S-2400' in cold
    state, will try to load a firmware
    [12044.881626] usb 4-10: firmware: requesting dvb-usb-tt-s2400-01.fw
    [12044.918854] dvb-usb: downloading firmware from file
    'dvb-usb-tt-s2400-01.fw'
    [12044.980719] usbcore: registered new interface driver dvb_usb_ttusb2
    [12044.981478] usb 4-10: USB disconnect, address 5
    [12044.985169] dvb-usb: generic DVB-USB module successfully
    deinitialized and disconnected.
    [12046.744023] usb 4-10: new high speed USB device using ehci_hcd and
    address 6
    [12046.876980] usb 4-10: configuration #1 chosen from 1 choice
    [12046.877673] dvb-usb: found a 'Technotrend TT-connect S-2400' in warm
    state.
    [12046.878601] dvb-usb: will pass the complete MPEG2 transport stream to
    the software demuxer.
    [12046.878959] DVB: registering new adapter (Technotrend TT-connect S-2400)
    [12046.886861] DVB: registering adapter 0 frontend 0 (Philips TDA10086
    DVB-S)...
    [12046.891434] LNBx2x attached on addr=8<3>dvb-usb: recv bulk message
    failed: -110
    [12048.888080] ttusb2: there might have been an error during control
    message transfer. (rlen = 0, was 0)
    [12048.888320] dvb-usb: Technotrend TT-connect S-2400 successfully
    initialized and connected.

    Reverting b963801164618e25fbdc0cd452ce49c3628b46c8 (manually, as there
    are conflicting changes) causes it to work again. The wierd random
    frontend number looks strange though.

    [ 2406.492027] usb 2-10: new high speed USB device using ehci_hcd and
    address 7
    [ 2406.625622] usb 2-10: configuration #1 chosen from 1 choice
    [ 2406.626328] dvb-usb: found a 'Technotrend TT-connect S-2400' in cold
    state, will try to load a firmware
    [ 2406.626335] usb 2-10: firmware: requesting dvb-usb-tt-s2400-01.fw
    [ 2406.628650] dvb-usb: downloading firmware from file
    'dvb-usb-tt-s2400-01.fw'
    [ 2406.690868] usb 2-10: USB disconnect, address 7
    [ 2406.693282] dvb-usb: generic DVB-USB module successfully
    deinitialized and disconnected.
    [ 2408.453024] usb 2-10: new high speed USB device using ehci_hcd and
    address 8
    [ 2408.585983] usb 2-10: configuration #1 chosen from 1 choice
    [ 2408.586652] dvb-usb: found a 'Technotrend TT-connect S-2400' in warm
    state.
    [ 2408.587727] dvb-usb: will pass the complete MPEG2 transport stream to
    the software demuxer.
    [ 2408.588080] DVB: registering new adapter (Technotrend TT-connect S-2400)
    [ 2408.591575] DVB: registering adapter 0 frontend 42056112 (Philips
    TDA10086 DVB-S)...
    [ 2408.595941] LNBx2x attached on addr=8<6>dvb-usb: Technotrend
    TT-connect S-2400 successfully initialized and connected.

    I'm happy to do any further diagnostics if it will help.

    David




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