Hello, I recently purchased "TechnoTrend TT-connect CT2-4650 CI" in order to watch DVB-C cable TV. I have obtained CAM and smart card from my cable TV provider. Initially, I tried the closed-source driver from the manufacturer; I have scanned (w_scan) over hundred of channels and I was able to watch few channels (vlc or xine) for several minutes. After couple of channels switches however, xine started to report 'DVB Signal Lost' for any channel. The w_scan founds nothing anymore - tried multiple kernels on different machines, during several days, nothing ;) Manufacturer is not providing linux support and directed me to linux_media instead. The situation with linux_media is not better however (tried recent media_build on ubuntu 3.16 and fedora 3.17 kernels) 1. the device is detected without any problems, no single error reported: [ 1957.068871] dvb-usb: found a 'TechnoTrend TT-connect CT2-4650 CI' in warm state. [ 1957.068999] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer. [ 1957.069182] DVB: registering new adapter (TechnoTrend TT-connect CT2-4650 CI) [ 1957.070518] dvb-usb: MAC address: bc:ea:2b:65:02:3b [ 1957.283195] i2c i2c-9: Added multiplexed i2c bus 10 [ 1957.283205] si2168 9-0064: Silicon Labs Si2168 successfully attached [ 1957.287689] si2157 10-0060: Silicon Labs Si2147/2148/2157/2158 successfully attached [ 1957.498312] sp2 9-0040: CIMaX SP2 successfully attached [ 1957.498348] usb 1-1.3: DVB: registering adapter 0 frontend 0 (Silicon Labs Si2168)... [ 1957.498835] Registered IR keymap rc-tt-1500 [ 1957.499038] input: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/rc/rc0/input23 [ 1957.499408] rc0: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/rc/rc0 [ 1957.499413] dvb-usb: schedule remote query interval to 150 msecs. [ 1957.499419] dvb-usb: TechnoTrend TT-connect CT2-4650 CI successfully initialized and connected. [ 1963.755553] dvb_ca adapter 0: DVB CAM detected and initialised successfully [ 2016.342642] si2168 9-0064: found a 'Silicon Labs Si2168' in cold state [ 2016.342910] si2168 9-0064: downloading firmware from file 'dvb-demod-si2168-a20-01.fw' [ 2017.729882] si2168 9-0064: found a 'Silicon Labs Si2168' in warm state [ 2017.739725] si2157 10-0060: found a 'Silicon Labs Si2146/2147/2148/2157/2158' in cold state [ 2017.739805] si2157 10-0060: downloading firmware from file 'dvb-tuner-si2158-a20-01.fw' 2. yet, the full dvb-c w_scan founds zero channels (after 20+ minutes of scanning) 3. an attempt to tune a channel (czap) using the channel list scanned the first time returns: $ czap -r -c channels.xine.conf 'Eurosport HD' using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' reading channels from file 'channels.xine.conf' 141 Eurosport HD:562000000:INVERSION_AUTO:6900000:FEC_NONE:QAM_256:3000:3201:14001 141 Eurosport HD: f 562000000, s 6900000, i 2, fec 0, qam 5, v 0xbb8, a 0xc81, s 0x36b1 ERROR: frontend device is not a QAM (DVB-C) device Any advice, please, what can be done to make this working? The device works without any problems from windows. Two additional notes: 1. The md5sum 0276023ce027bab05c2e7053033e2182 for the firmware linked at http://www.linuxtv.org/wiki/index.php/TechnoTrend_TT-TVStick_CT2-4400#Firmware does not match: $ wget http://www.tt-downloads.de/bda-treiber_4.2.0.0.zip ... 2014-12-07 13:12:25 (1.06 MB/s) - ‘bda-treiber_4.2.0.0.zip’ saved [352188/352188] $ unzip bda-treiber_4.2.0.0.zip Archive: bda-treiber_4.2.0.0.zip inflating: ttTVStick4400.inf inflating: ttTVStick4400.sys inflating: ttTVStick4400_64.sys inflating: tttvstick4400.cat $ md5sum ttTVStick4400_64.sys 7ac2029e1db41b8942691df270e0f84f ttTVStick4400_64.sys I copied firmwares from OpenELEC 2. I am getting this, with w_scan, with the media_build driver: $ cat w_scan using DVB API 5.a frontend 'Silicon Labs Si2168' supports INVERSION_AUTO QAM_AUTO FEC_AUTO FREQ (110.00MHz ... 862.00MHz) This dvb driver is *buggy*: the symbol rate limits are undefined - please report to linuxtv.org ... 3. Manufacturer driver displays no w_scan "no QAM" errors, even czap seems fine: $ czap -r -c channels.xine.conf 'Eurosport HD' using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' reading channels from file 'channels.xine.conf' 141 Eurosport HD:562000000:INVERSION_AUTO:6900000:FEC_NONE:QAM_256:3000:3201:14001 141 Eurosport HD: f 562000000, s 6900000, i 2, fec 0, qam 5, v 0xbb8, a 0xc81, s 0x36b1 Version: 5.10 FE_CAN { DVB-C (A) } status 1f | signal 5453 | snr 0003 | ber 8e8dead8 | unc 000f00ed | FE_HAS_LOCK status 1f | signal 5453 | snr 0003 | ber 00000000 | unc 000f00ed | FE_HAS_LOCK ... Yet, the application reports no signal. Regards, Pavol -- 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
