Hi, On Thu, 29 Dec 2005, rbnw07377@xxxxxxxxxxxxxxxx wrote: > Received the following kernel oops whilst using scandvb on: >> uname -a > Linux laptop 2.6.14-1.1644_FC4 #1 Sun Nov 27 03:25:11 EST 2005 i686 i686 > i386 GNU/Linux > (Dell Latitude C600) > > Sorry about the size, but I'm not sure which of this lot is important!!! > This happens everytime I use scandvb or when scanning using Kaffeine > (which I think is the same thing :-)). Sometimes the whole lot just > freezes and I have to hard reboot. Yes!! Finally I see what the problem is people pointing out all the time in previous threads: Eg.: http://www.linuxtv.org/pipermail/linux-dvb/2005-December/006853.html and other threads (such as Twinhan Alpha Twincard). Those cards in running mode exceed the USB power specification (500mA/device) and that's why: > Dec 28 00:56:39 localhost kernel: dvb-usb: bulk message failed: -71 (1/1) > Dec 28 00:56:40 localhost kernel: hub 1-0:1.0: port 1 disabled by hub > (EMI?), re-enabling... > Dec 28 00:56:40 localhost kernel: usb 1-1: USB disconnect, address 3 And unfortunately the dvb-usb (or rather the dvb-core) is not capable of hotplug-events and that's why: > Dec 28 00:56:40 localhost kernel: Unable to handle kernel paging request > at virtual address d4b0a2a4 > Dec 28 00:56:40 localhost kernel: EIP is at dvb_demux_poll+0x28/0x61 > [dvb_core] Because the unplug caused the driver to deallocate the dvb-structures while the device is used by an application. > Dec 28 00:56:41 localhost kernel: usb 1-1: new full speed USB device using > uhci_hcd and address 4 > Dec 28 00:56:41 localhost kernel: dvb-usb: found a 'WideView WT-220U > PenType Receiver (Typhoon/Freecom)' in warm state. > Dec 28 00:56:41 localhost kernel: dvb-usb: will use the device's hardware > PID filter (table count: 15). > Dec 28 00:56:41 localhost kernel: DVB: registering new adapter (WideView > WT-220U PenType Receiver (Typhoon/Freecom)). > Dec 28 00:56:41 localhost kernel: DVB: registering frontend 0 (WideView > USB DVB-T)... > Dec 28 00:56:41 localhost kernel: dvb-usb: schedule remote query interval > to 300 msecs. > Dec 28 00:56:41 localhost kernel: dvb-usb: WideView WT-220U PenType > Receiver (Typhoon/Freecom) successfully initialized and connected. > Dec 28 00:56:42 localhost kernel: dvb-usb: recv bulk message failed: -110 After sometime the USB hub allows the device to show up again. (it is still in warm state, that's why there is no firmware download). Patrick. -- Mail: patrick.boettcher@xxxxxxx WWW: http://www.wi-bw.tfh-wildau.de/~pboettch/
