On Sun, 10 Apr 2011, Andy Walls wrote: > On Wed, 2011-04-06 at 13:28 -0400, Eric B Munson wrote: > > On Tue, Apr 5, 2011 at 10:58 AM, Andy Walls <awalls@xxxxxxxxxxxxxxxx> wrote: > > > On Mon, 2011-04-04 at 14:36 -0400, Eric B Munson wrote: > > >> On Mon, Apr 4, 2011 at 11:16 AM, Eric B Munson <emunson@xxxxxxxxx> wrote: > > >> > On Mon, Apr 4, 2011 at 9:12 AM, Andy Walls <awalls@xxxxxxxxxxxxxxxx> wrote: > > >> >> On Mon, 2011-04-04 at 08:20 -0400, Eric B Munson wrote: > > >> >>> I the above mentioned capture card and the digital side of the card > > >> >>> works well. However, when I try to get video from the analog side of > > >> >>> the card, all I get is a red screen and no sound regardless of channel > > >> >>> requested. This is a problem I see in 2.6.39-rc1 though I typically > > >> >>> run the ubuntu 10.10 kernel with the newest drivers built from source. > > >> >>> Is there something in setup or configuration that I may be missing? > > >> >> > > >> >> Eric, > > >> >> > > >> >> You are likely missing the last 3 fixes here: > > >> >> > > >> >> http://git.linuxtv.org/awalls/media_tree.git?a=shortlog;h=refs/heads/cx18_39 > > >> >> > > >> >> (one of which is critical for analog to work). > > >> >> > > >> >> Also check the ivtv-users and ivtv-devel list for past discussions on > > >> >> the "red screen" showing up for known well supported models and what to > > >> >> try. > > >> >> > > >> > Thanks, I will try hand applying these. > > >> > > > >> > > >> I don't have a red screen anymore, now all get from analog static and > > >> mythtv's digital channel scanner now seems broken. > > > > > > Hmmm. > > > > > > 1. Please provide the output of dmesg when the cx18 driver loads. > > [332935.115343] cx18: Start initialization, version 1.4.1 [332935.115385] cx18-0: Initializing card 0 [332935.115389] cx18-0: Autodetected Hauppauge card [332935.115449] cx18 0000:04:01.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [332935.127005] cx18-0: cx23418 revision 01010000 (B) [332935.342426] tveeprom 0-0050: Hauppauge model 74351, rev F1F5, serial# 7384278 [332935.342432] tveeprom 0-0050: MAC address is 00:0d:fe:70:ac:d6 [332935.342437] tveeprom 0-0050: tuner model is NXP 18271C2 (idx 155, type 54) [332935.342443] tveeprom 0-0050: TV standards PAL(B/G) NTSC(M) PAL(I) SECAM(L/L') PAL(D/D1/K) ATSC/DVB Digital (eeprom 0xfc) [332935.342448] tveeprom 0-0050: audio processor is CX23418 (idx 38) [332935.342453] tveeprom 0-0050: decoder processor is CX23418 (idx 31) [332935.342457] tveeprom 0-0050: has no radio [332935.342460] cx18-0: Autodetected Hauppauge HVR-1600 [332935.392016] cx18-0: Simultaneous Digital and Analog TV capture supported [332935.497007] tuner 1-0042: Tuner -1 found with type(s) Radio TV. [332935.501259] cs5345 0-004c: chip found @ 0x98 (cx18 i2c driver #0-0) [332935.548567] tda829x 1-0042: setting tuner address to 60 [332935.572554] tda18271 1-0060: creating new instance [332935.612568] TDA18271HD/C2 detected @ 1-0060 [332936.676587] tda18271: performing RF tracking filter calibration [332950.816567] tda18271: RF tracking filter calibration complete [332950.864571] tda829x 1-0042: type set to tda8295+18271 [332951.569137] cx18-0: Registered device video0 for encoder MPEG (64 x 32.00 kB) [332951.569143] DVB: registering new adapter (cx18) [332951.672187] tda18271 0-0060: creating new instance [332951.678691] TDA18271HD/C2 detected @ 0-0060 [332951.737797] cx18-0: loaded v4l-cx23418-cpu.fw firmware (158332 bytes) [332951.876157] cx18-0: loaded v4l-cx23418-apu.fw firmware V00120000 (141200 bytes) [332951.882195] cx18-0: FW version: 0.0.74.0 (Release 2007/03/12) [332951.984040] DVB: registering adapter 0 frontend 0 (Samsung S5H1411 QAM/8VSB Frontend)... [332951.984208] cx18-0: DVB Frontend registered [332951.984214] cx18-0: Registered DVB adapter0 for TS (32 x 32.00 kB) [332951.984268] cx18-0: Registered device video32 for encoder YUV (20 x 101.25 kB) [332951.984320] cx18-0: Registered device vbi0 for encoder VBI (20 x 51984 bytes) [332951.984367] cx18-0: Registered device video24 for encoder PCM audio (256 x 4.00 kB) [332951.984372] cx18-0: Initialized card: Hauppauge HVR-1600 [332951.984415] cx18: End initialization [332951.994916] cx18-alsa: module loading... [332952.733994] cx18-0 843: loaded v4l-cx23418-dig.fw firmware (16382 bytes) [332952.753703] cx18-0 843: verified load of v4l-cx23418-dig.fw firmware (16382 bytes) > > > 3. Please provide the relevant portion of the mythbackend log where > > > where the digital scanner starts and then fails. > > > > So the Digital scanner doesn't fail per se, it just doesn't pick up > > most of the digital channels available. The same is true of scan, it > > seems to find only 1 channel when I know that I have access to 18. > > Make sure it's not a signal integrity problem: > > http://ivtvdriver.org/index.php/Howto:Improve_signal_quality > > wild speculation: If the analog tuner driver init failed, maybe that is > having some bad EMI efect on the digital tuner > > I'm assumiong you got more than the 1 channel before trying to enable > analog tuning.A That is true, when I was running the backported drivers on the Ubuntu 10.10 kernel I was able to see 16 of the 18 available to me. > > > > > > > 4. Does digital tuning still work in MythTV despite the digital scanner > > > not working? > > > > Using the command line tools you linked I am able to tune to the > > channel that is found and watch it via mplayer. > > Can you tune to other known digital channels? I will have to see if I can set one up by hand and try it. I will get back to you when I am able to do this (should be later today). > > > Let me know if you need anything else. > > Are you tuning digital cable (North American QAM) or digital Over The > Air (ATSC)? I am using digital cable (NA QAM). > > I tune ATSC with a high gain antenna and a Winegard preamplifer for > fringe areas; I'm 75 miles away from the city. One of the most > important contributions to getting a good signal was a lightning > protection/grounding block for the coaxial cable shield near the antenna > end of the cable. I suspect I was picking up a lot of EMI from in-home > sources and other local sources. > > If using a preamp, make sure you are not over-amplifying the signal. It > will cause clipping in the tuner's front end, inducing intermodulation > products which look like noise and degrade the SNR. > > Regards, > Andy > > >
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