Alan Stern wrote: > On Sat, 23 May 2009, Pekka Enberg wrote: > > >> On Sat, May 23, 2009 at 12:32 AM, David <david@xxxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxxx> 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 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
