I ha a Hauppauge WinTV Nova-T stick USB 2.0 DVB adapter. This adapter uses the dib0700 driver. This works, but sometimes the (dev/dvb/adapter0/frontend0 file dissapears suddenly, and then the adapter is stop working. The first time, i tried to use kaffeine and it was unable to re-scan channels for a second time if i don't delete temp files. Today, one time has worked, but using dvbscan from linuxtv to scan channels in a few cases it has produces a very long error with processor registers dump included. I was unable to reproduce this, and never happened in console window, and then i am unable to save it. Other few cases, /dev/dvb/adapter0/frontend0 file dissapeared while scanning with dvbscan, without other effects (if device file dissapears scanning in kaffeine, teh system freezes with keyboars leds flashing, and i have to use the reset button on pc tower). Reproducible: Sometimes Actual Results: install dvb adapter try to scan channels and launcha tv apllication, or use an aplication to scan channels Expected Results: The /dev/dvb/adapter0/frontend0 must don't dissapear. Gentoo-sources-2.6.20 sources. linuxtv-dvb-firmware-2006.11.13 with "usb-dib0700" USE (this firmware are not available in previous version). linuxtv-dvb-apps-1.1.1.20070114 WinTV Nova-T stick with 2040:7050 USB ID. kaffeine-0.7.1-r2 with "dvb" USE
can you please attach dmesg output. But I suspect that is because of the USB-connection type. I also get some usb-disconnects with usb-dvb-devices. The dvb-driver cannot cope with that yet, and thus produces a kernel panic.
Are you sure is a USB problem. I have two USB 2.0 controllers: the included nforce2 chipset and a VIA controller in a pci slot. The dvb adapter is the only device attached to the pci card. I can change the device to the other controller and test it (the nforce controller has a USB HDD attached that works ok). But...an ls /dev/dvb/adapter0 -l shows: $ ls /dev/dvb/adapter0 -l total 0 crw-rw---- 1 root video 212, 4 feb 10 12:34 demux0 crw-rw---- 1 root video 212, 5 feb 10 12:34 dvr0 crw-rw---- 1 root video 212, 3 feb 10 12:34 frontend0 crw-rw---- 1 root video 212, 7 feb 10 12:34 net0 $ WEhen the device dissapears, only the frontend0 file is missing, the other three files don't dissapear, and this is the result: $ ls /dev/dvb/adapter0 demux0 dvr0 net0 if i unplug the device, the entire /dev/dvb tree dissapears: $ ls /dev/dvb/ ls: no se puede acceder a /dev/dvb/: No existe el fichero o el directorio I think this is a kernel driver problem. Also, in Windows this problem isn't present.
I tried connecting the adapter in one of the nforce2 USB ports and seems the problem are solved. May be the USB card is unable to provide enough power to the device and this causes the problem. I close the bug, if the problem persists then i created one new bug or reopen this. Thanks
