Hi, I've been having problems with my DVB receivers lately. I'm not sure whether the problem is in the receivers or their firmware, or Linux. Some symptoms point to the card, some point to Linux (because they should try to prevent the system from hanging even with bad hardware if the hardware is peripheral?). Perhaps the majority of USB DVB receivers are actually useless junk? I'm trying to develop a good DVB PVR, but if I can't fix these problems there's not much point in continuing. I hope someone can offer some suggestions on what's causing the problems and/or how I can diagnose them better, and hopefully get things fixed. Frequently one of them will stop working. The main symptom is that after tuning they fail to get a signal. If I don't "fix" it asap by power cycling the PC (reboot seems to be inadequate) the situation seems to escalate until the entire system hangs, either when trying to use the receiver or at shutdown. The problems seem to have developed or exacerbated mainly since I started using an Intel NUC as my PVR and therefore had to replace my DVBSky PCI-E DVB-S2 card with a USB TeVii S662 DVB-S2. After a while it started exhibiting the above symptoms with increasing frequency. When it got to daily problems I returned it under warranty and replaced it with a DVBSky S960 V2. IIRC it has the same Montage chipset as the TeVii; this seems to be the only chipset commonly available in USB DVB-S2 devices. At first, the change of device seemed to cure the issue, but that's started doing the same thing too. Meanwhile I've also been using a DVB-T2 USB stick. At first I had a Pinnacle PCTV 290e. That worked quite well until it seemed to fail completely (not even detected by lsusb). I replaced it with a "Geniatech MyGica DVB-T2/T USB" which I think uses the si2168/si2157 modules. This one's also unreliable. -- TH
