Patch for TwinHan VT DST and compatible DVB-T cards
Hi, here a small patch to get a TwinHan VT DST DVB-T card working with kernels >= 2.6.32. Analogously to http://linuxtv.org/hg/v4l-dvb/rev/0e735b509163 I had to: "Fill in the .caps field in struct dst_dvbt_ops (around line 1763) with all the supported QAM modulation methods to match the capabilities of the card as implemented in function dst_set_modulation (around line 502). Note that beginning with linux kernel version 2.6.32 the modulation method is checked (by function dvb_frontend_check_parameters in file drivers/media/dvb/dvb-core/dvb_frontend.c) and thus tuning fails if you use a modulation method that is not present in the .caps field." Patch: diff -r 9652f85e688a linux/drivers/media/dvb/bt8xx/dst.c --- a/linux/drivers/media/dvb/bt8xx/dst.c Thu May 27 02:02:09 2010 -0300 +++ b/linux/drivers/media/dvb/bt8xx/dst.c Tue Jul 27 09:34:38 2010 +0200 @@ -1763,7 +1763,15 @@ .frequency_min = 13700, .frequency_max = 85800, .frequency_stepsize = 17, - .caps = FE_CAN_FEC_AUTO | FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO + .caps = FE_CAN_FEC_AUTO | + FE_CAN_QAM_AUTO | + FE_CAN_QAM_16 | + FE_CAN_QAM_32 | + FE_CAN_QAM_64 | + FE_CAN_QAM_128 | + FE_CAN_QAM_256 | + FE_CAN_TRANSMISSION_MODE_AUTO | + FE_CAN_GUARD_INTERVAL_AUTO }, .release = dst_release, -8<-- Tested on 2.6.32-24, works fine. Thanks to Klaas de Waal for creating the original patch for the DVB-C cards. Hope this helps someone, Arne -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Development list only?
Hello, I have been redirected here after subscribing to the "linux-dvb" list. Thus, I asked my usage-related question on this mailing list, but I did not get any reply up to now (subject "Very poor quality on buget card TwinHan VP DST"). I suspect that this is because this mailing list is not a user mailing list, but developers-only. If this is the case, could someone please point me in the right direction for discussing user issues like mine? Thank you very much, Arne Brutschy -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Very poor (signal?) quality on buget card TwinHan VP DST
Hi, I am using a TwinHan VP DST card under Ubuntu Lucid Lynx (2.6.32-23 with s2-liplianin-dkms updated dvb drivers). The card is detected fine, but does not seem to have analogue tuner. I can scan channels, and I can watch TV using digital-only capable applications (eg, Me-TV, Kaffeine). Nevertheless, the general picture quality is VERY bad. Basically, there's not a single frame without decoding error and freezes. Sound suffers the same problem. It all behaves like a bad signal/bad antenna installation. The problem is: a parallel windows installation gives a crystal-clear and stable picture, without touching the antenna in between. I assume it's a problem with channel fine-tuning or software decoder quality. Can anyone help me with solving these problems? Thanks Arne -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
