Hi All, I don't know if this is a good place for this. I found some kind of bug in em28xx for Kworld 355U, this is a lsusb line for my tuner: Bus 001 Device 004: ID eb1a:e357 eMPIA Technology, Inc. The problem is with initializing the Quantek QT1010 tuner chip. Kernel log prints message: [ 99.800535] qt1010 I2C read failed Unfortunately tuner can't find any channels (on windows 7 it finds all available). I know that in Dec 2011 there was a patch that added support of this usb tuner. I've used latest git drivers backported to Arch Linux stock kernel (via AUR) and 3.3rc6. I was trying to find what is wrong but my knowledge about drivers and kernel modules is poor. I think that i2c (or GPIO) address is wrong. Cheers Pawel PS: Here is a part of kernel log related with usb tuner, messge looks similar in kernl 3.3rc6: [ 99.403415] usb 1-1: new high-speed USB device number 4 using ehci_hcd [ 99.542931] WARNING: You are using an experimental version of the media stack. [ 99.542941] As the driver is backported to an older kernel, it doesn't offer [ 99.542948] enough quality for its usage in production. [ 99.542954] Use it with care. [ 99.542958] Latest git patches (needed if you report a bug to linux-media@xxxxxxxxxxxxxxx): [ 99.542965] 632fba4d012458fd5fedc678fb9b0f8bc59ceda2 [media] cx25821: Add a card definition for No brand cards that have: subvendor = 0x0000 subdevice = 0x0000 [ 99.542976] 1b1301e67bbcad0649a8b3c6a944d2b2acddc411 [media] Fix small DocBook typo [ 99.542984] 0f67a03ff6ada162ad7518d9092f72d830d3a887 [media] media: tvp5150: support g_mbus_fmt callback [ 99.552576] IR NEC protocol handler initialized [ 99.557883] IR RC5(x) protocol handler initialized [ 99.568253] IR RC6 protocol handler initialized [ 99.571555] em28xx: New device USB 2870 Device @ 480 Mbps (eb1a:e357, interface 0, class 0) [ 99.571571] em28xx: Video interface 0 found [ 99.571581] em28xx: DVB interface 0 found [ 99.571805] em28xx #0: chip ID is em2870 [ 99.576229] IR JVC protocol handler initialized [ 99.581302] IR Sony protocol handler initialized [ 99.586067] IR MCE Keyboard/mouse protocol handler initialized [ 99.592333] lirc_dev: IR Remote Control driver registered, major 250 [ 99.594696] IR LIRC bridge handler initialized [ 99.690544] em28xx #0: i2c eeprom 00: 1a eb 67 95 1a eb 57 e3 c0 12 62 40 6a 22 00 00 [ 99.690584] em28xx #0: i2c eeprom 10: 00 00 04 57 6a 0d 00 00 60 00 00 00 02 00 00 00 [ 99.690618] em28xx #0: i2c eeprom 20: 54 00 00 00 f0 10 01 00 00 00 00 00 5b 00 00 00 [ 99.690651] em28xx #0: i2c eeprom 30: 00 00 20 40 20 80 02 20 01 01 00 00 00 00 00 00 [ 99.690683] em28xx #0: i2c eeprom 40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 99.690716] em28xx #0: i2c eeprom 50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 99.690748] em28xx #0: i2c eeprom 60: 00 00 00 00 00 00 00 00 00 00 22 03 55 00 53 00 [ 99.690780] em28xx #0: i2c eeprom 70: 42 00 20 00 32 00 38 00 37 00 30 00 20 00 44 00 [ 99.690813] em28xx #0: i2c eeprom 80: 65 00 76 00 69 00 63 00 65 00 00 00 00 00 00 00 [ 99.690846] em28xx #0: i2c eeprom 90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 99.690878] em28xx #0: i2c eeprom a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 99.690910] em28xx #0: i2c eeprom b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 99.690942] em28xx #0: i2c eeprom c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 99.690974] em28xx #0: i2c eeprom d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 99.691007] em28xx #0: i2c eeprom e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 99.691039] em28xx #0: i2c eeprom f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 99.691076] em28xx #0: EEPROM ID= 0x9567eb1a, EEPROM hash = 0x32317d02 [ 99.691084] em28xx #0: EEPROM info: [ 99.691090] em28xx #0: No audio on board. [ 99.691096] em28xx #0: 500mA max power [ 99.691105] em28xx #0: Table at 0x04, strings=0x226a, 0x0000, 0x0000 [ 99.692160] em28xx #0: Identified as Kworld 355 U DVB-T (card=42) [ 99.692169] em28xx #0: [ 99.692173] [ 99.692181] em28xx #0: The support for this board weren't valid yet. [ 99.692189] em28xx #0: Please send a report of having this working [ 99.692197] em28xx #0: not to V4L mailing list (and/or to other addresses) [ 99.692202] [ 99.692211] em28xx #0: v4l2 driver version 0.1.3 [ 99.697951] em28xx #0: V4L2 video device registered as video1 [ 99.700909] usbcore: registered new interface driver em28xx [ 99.717805] WARNING: You are using an experimental version of the media stack. [ 99.717817] As the driver is backported to an older kernel, it doesn't offer [ 99.717825] enough quality for its usage in production. [ 99.717832] Use it with care. [ 99.717836] Latest git patches (needed if you report a bug to linux-media@xxxxxxxxxxxxxxx): [ 99.717844] 632fba4d012458fd5fedc678fb9b0f8bc59ceda2 [media] cx25821: Add a card definition for No brand cards that have: subvendor = 0x0000 subdevice = 0x0000 [ 99.717856] 1b1301e67bbcad0649a8b3c6a944d2b2acddc411 [media] Fix small DocBook typo [ 99.717863] 0f67a03ff6ada162ad7518d9092f72d830d3a887 [media] media: tvp5150: support g_mbus_fmt callback [ 99.800535] qt1010 I2C read failed [ 99.800560] DVB: registering new adapter (em28xx #0) [ 99.800573] DVB: registering adapter 0 frontend 0 (Zarlink ZL10353 DVB-T)... [ 99.806869] em28xx #0: Successfully loaded em28xx-dvb [ 99.806886] Em28xx: Initialized (Em28xx dvb Extension) extension -- 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
