From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mout.gmx.net ([212.227.17.21]:62050 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753893AbdBGS5d (ORCPT ); Tue, 7 Feb 2017 13:57:33 -0500 Received: from localhost ([37.120.85.196]) by mail.gmx.com (mrgmx103 [212.227.17.168]) with ESMTPSA (Nemesis) id 0MJBn4-1cYQs74AfK-002sHJ for ; Tue, 07 Feb 2017 19:40:58 +0100 Date: Tue, 7 Feb 2017 19:40:55 +0100 From: Matthias Lay To: linux-media@vger.kernel.org Subject: dvb-s usb problems Message-ID: <20170207194055.18d31a83@gmx.li> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-media-owner@vger.kernel.org List-ID: Hi all, I am having some problems getting some channels to work on usb dvb-s devices. tried 2 so far a skystar and teviis660 both have the same problem. I am about to switch from an PCI-e card to a usb hosted solution. My PCI-e setup (skystar too) never had any problems. both systems on a 4.9 Kernel. Astra 19,2 Problem on the USB system using dvb-utils scan, It doesnt find any HD channels. the only one is WDR HD which seems to be the only one using QPSK. the other are 8PSK I think. using mythbackend, I am able to scan and find the channels, but when its recording, the quality is poor with a lot of errors in the picture. nothing in dmesg, but if I do a "scan -c" using dvb-utils after mythbackend locked one of the channels I get *************************************** open("/dev/dvb/adapter0/demux0", O_RDWR|O_NONBLOCK) = 4 ioctl(4, 0x403c6f2b, 0xbeac6f48) = -1 EINVAL (Invalid argument) write(2, "start_filter:1752: ERROR: ioctl "..., 75start_filter:1752: ERROR: ioctl DMX_SET_FILTER failed: 22 Invalid argument ) = 75 ioctl(4, 0x6f2a, 0x1) = 0 close(4) = 0 open("/dev/dvb/adapter0/demux0", O_RDWR|O_NONBLOCK) = 4 ioctl(4, 0x403c6f2b, 0xbeac6f48) = -1 EINVAL (Invalid argument) write(2, "start_filter:1752: ERROR: ioctl "..., 75start_filter:1752: ERROR: ioctl DMX_SET_FILTER failed: 22 Invalid argument ) = 75 ioctl(4, 0x6f2a, 0x1) = 0 close(4) = 0 ********************************************************* is this a known problem? you have any hint for me, where to check for the problem? Greetz loomy