Re: [linux-dvb] Multiple em28xx devices
Hello rvf16, On Thu, 09 Apr 2009 17:05:36 +0300 rvf16 rv...@yahoo.gr wrote: Hello. I am trying to use two Terratec Cinergy Hybrid T USB XS FM tuners, at the same time, on the same system. Both work great when used solely. When used simultaneously the second one gives the following error : v4l2: unable to open '/dev/video1': No space left on device I am using the em28xx-new-b2e841c05e94 driver from http://mcentral.de/hg/~mrec/em28xx-new on a Fedora 6 system. I have opened this topic in the em28xx mailing list http://mcentral.de/pipermail/em28xx/ but it seems it is not maintained any more. According to comments on relevant problems (the following is for spca5xx driver for cameras with same problem) : --- When other USB devices are present on the same host controller bus as the camera, the bandwidth requirements of the spca5xx driver are not being met, with some hardware configurations. The spca5xx driver is asking for more bandwidth than is available which results in these error messages. --- We are, under these circumstances, advised to either insert the device in another USB socket or even install a PCI card with extra USB sockets so that the device ends up in different bus. I tried to insert the second device in another usb socket but it always ends up at the same bus with the first one : #lsusb Bus 005 Device 014: ID 0ccd:0072 TerraTec Electronic GmbH Bus 005 Device 015: ID 0ccd:0072 TerraTec Electronic GmbH Bus 005 Device 001: ID : Bus 002 Device 006: ID 046d:c50e Logitech, Inc. MX-1000 Cordless Mouse Receiver Bus 002 Device 001: ID : Bus 004 Device 001: ID : Bus 003 Device 001: ID : Bus 001 Device 001: ID : which happens to a lot of people from what i have seen. As this is a laptop with 4 USB sockets : # lspci | grep USB 00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #1 (rev 01) 00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #2 (rev 01) 00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #3 (rev 01) 00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #4 (rev 01) 00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01) i cannot install a PCI card with extra USB sockets so there goes workaround number two. In spca5xx case a developer patched the driver so that the bandwidth was throttled in such a way that two devices used simultaneously would never exceed maximum. Can that be done with em28xx? If not, is there any other workaround to this problem? Please use upstream repository, we do not support sources from http://mcentral.de/hg/~mrec/em28xx-new this is a parallel project. For additional info how to download upstream tree see: http://www.linuxtv.org/wiki/index.php/How_to_Obtain%2C_Build_and_Install_V4L-DVB_Device_Drivers Cheers, Douglas -- 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
Re: [linux-dvb] Multiple em28xx devices
On Thu, Apr 9, 2009 at 10:14 AM, Douglas Schilling Landgraf Please use upstream repository, we do not support sources from http://mcentral.de/hg/~mrec/em28xx-new this is a parallel project. For additional info how to download upstream tree see: http://www.linuxtv.org/wiki/index.php/How_to_Obtain%2C_Build_and_Install_V4L-DVB_Device_Drivers Cheers, Douglas Douglas, Unless he is willing to do without dvb support, he's not going to be able to use the upstream em28xx driver with the Terratec XS. I've got a device being mailed to me, at which point I will be able to get the dvb support working. Devin -- Devin J. Heitmueller http://www.devinheitmueller.com AIM: devinheitmueller -- 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
Re: [linux-dvb] Multiple em28xx devices
Hello Devin, On Thu, 9 Apr 2009 10:20:33 -0400 Devin Heitmueller devin.heitmuel...@gmail.com wrote: On Thu, Apr 9, 2009 at 10:14 AM, Douglas Schilling Landgraf Please use upstream repository, we do not support sources from http://mcentral.de/hg/~mrec/em28xx-new this is a parallel project. For additional info how to download upstream tree see: http://www.linuxtv.org/wiki/index.php/How_to_Obtain%2C_Build_and_Install_V4L-DVB_Device_Drivers Cheers, Douglas Douglas, Unless he is willing to do without dvb support, he's not going to be able to use the upstream em28xx driver with the Terratec XS. The idea behind that email is to inform that we do not support any parallel project. I've got a device being mailed to me, at which point I will be able to get the dvb support working. Great, good news! Cheers, Douglas -- 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
Re: [linux-dvb] Multiple em28xx devices
On Thu, Apr 9, 2009 at 4:05 PM, rvf16 rv...@yahoo.gr wrote: Hello. I am trying to use two Terratec Cinergy Hybrid T USB XS FM tuners, at the same time, on the same system. Both work great when used solely. When used simultaneously the second one gives the following error : v4l2: unable to open '/dev/video1': No space left on device I am using the em28xx-new-b2e841c05e94 driver from http://mcentral.de/hg/~mrec/em28xx-new on a Fedora 6 system. I have opened this topic in the em28xx mailing list http://mcentral.de/pipermail/em28xx/ but it seems it is not maintained any more. hmm I'll check this there has been an update of the mailsystem on that box recently. According to comments on relevant problems (the following is for spca5xx driver for cameras with same problem) : --- When other USB devices are present on the same host controller bus as the camera, the bandwidth requirements of the spca5xx driver are not being met, with some hardware configurations. The spca5xx driver is asking for more bandwidth than is available which results in these error messages. --- We are, under these circumstances, advised to either insert the device in another USB socket or even install a PCI card with extra USB sockets so that the device ends up in different bus. I tried to insert the second device in another usb socket but it always ends up at the same bus with the first one : #lsusb Bus 005 Device 014: ID 0ccd:0072 TerraTec Electronic GmbH Bus 005 Device 015: ID 0ccd:0072 TerraTec Electronic GmbH Bus 005 Device 001: ID : Bus 002 Device 006: ID 046d:c50e Logitech, Inc. MX-1000 Cordless Mouse Receiver Bus 002 Device 001: ID : Bus 004 Device 001: ID : Bus 003 Device 001: ID : Bus 001 Device 001: ID : which happens to a lot of people from what i have seen. As this is a laptop with 4 USB sockets : # lspci | grep USB 00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #1 (rev 01) 00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #2 (rev 01) 00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #3 (rev 01) 00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #4 (rev 01) 00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01) i cannot install a PCI card with extra USB sockets so there goes workaround number two. you can simply try to load the em28xx with alt=3 modprobe em28xx alt=3 as long as the bus is not fully utilized this should work fine! remember you only have 480 mbit; analog TV at least requires up to 170 mbit for 1 device. cheers, Markus In spca5xx case a developer patched the driver so that the bandwidth was throttled in such a way that two devices used simultaneously would never exceed maximum. Can that be done with em28xx? If not, is there any other workaround to this problem? Thank you. Regards. ___ linux-dvb users mailing list For V4L/DVB development, please use instead linux-media@vger.kernel.org linux-...@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb -- 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
