سلام من یک کارت dvb x-vision 4100  دارم و فبلا روی اوبونتو 16.04 کار میکرد و مشکلی نداشت اما ازوقتی 18.04 نصب کردم نتونستم ازش استفاده کنم .
وقتی که دستور زیر رو برای کانال یابی میزنم ارور زیر رو میده
کسی میتونه راهنمایی کنه ممنون
 w_scan -c -L IR > file
w_scan -c -L IR 
w_scan version 20170107 (compiled for DVB API 5.10)
WARNING: 
COUNTRY CODE IS NOT DEFINED. FALLING BACK TO "DE"
using settings for GERMANY
DVB aerial
DVB-T Europe
scan type TERRESTRIAL, channellist 4
output format vdr-2.0
WARNING: could not guess your codepage. Falling back to 'UTF-8'
output charset 'UTF-8', use -C <charset> to override
Info: using DVB adapter auto detection.
   /dev/dvb/adapter0/frontend0 -> TERRESTRIAL "Afatech AF9033 (DVB-T)": good :-)
Using TERRESTRIAL frontend (adapter /dev/dvb/adapter0/frontend0)
-_-_-_-_ Getting frontend capabilities-_-_-_-_ 
Using DVB API 5.10
frontend 'Afatech AF9033 (DVB-T)' supports
INVERSION_AUTO
QAM_AUTO
TRANSMISSION_MODE_AUTO
GUARD_INTERVAL_AUTO
HIERARCHY_AUTO
FEC_AUTO
BANDWIDTH_AUTO not supported, trying 6/7/8 MHz.
FREQ (174.00MHz ... 862.00MHz)
-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ 
Scanning DVB-T...
Scanning 8MHz frequencies...
474000: (time: 00:14.027) 
482000: (time: 00:16.039) 
490000: (time: 00:18.055) 
498000: (time: 00:20.071) 
506000: (time: 00:22.087) 
514000: (time: 00:24.103) 
522000: (time: 00:26.119) 
530000: (time: 00:28.135) 
538000: (time: 00:30.151) 
546000: (time: 00:32.171) 
554000: (time: 00:34.183) 
562000: (time: 00:36.199) 
570000: (time: 00:38.215) 
578000: (time: 00:40.235) 
586000: (time: 00:42.247) 
594000: (time: 00:44.263) 
602000: (time: 00:46.279) 
610000: (time: 00:48.295) 
618000: (time: 00:50.311) 
626000: (time: 00:52.327) 
634000: (time: 00:54.343) 
642000: (time: 00:56.359) 
650000: (time: 00:58.375) 
658000: (time: 01:00.391) 
666000: (time: 01:02.407) 
674000: (time: 01:04.423) 
682000: (time: 01:06.439) 
690000: (time: 01:08.455) 
698000: (time: 01:10.471) 
706000: (time: 01:12.487) 
714000: (time: 01:14.503) 
722000: (time: 01:16.519) 
730000: (time: 01:18.535) 
738000: (time: 01:20.551) 
746000: (time: 01:22.567) 
754000: (time: 01:24.583) 
762000: (time: 01:26.599) 
770000: (time: 01:28.615) 
778000: (time: 01:30.631) 
786000: (time: 01:32.647) 
794000: (time: 01:34.663) 
802000: (time: 01:36.678) 
810000: (time: 01:38.694) 
818000: (time: 01:40.710) 
826000: (time: 01:42.726) 
834000: (time: 01:44.742) 
842000: (time: 01:46.758) 
850000: (time: 01:48.774) 
858000: (time: 01:50.790) 
ERROR: Sorry - i couldn't get any working frequency/transponder
 Nothing to scan!!