Well, figured it out after digging through the kernel USB core and hci source code: On Sat, 9 Jun 2007, Jan Wagner wrote: > The usb dvb-t receiver works just fine in WinXP, but in linux I get this > error in dmesg: > > flexcop_usb: submitting urb 0 failed with -28. > > and the receiver doesn't work, and /dev/dvb/adapter0 is not even created. > Which is strange. > > The error -28 perhaps is -ENOSPC, "no space left on device". At least per 'df > -h' there is plenty of free space on all mounts, so maybe this "space" is > lacking somewhere else. (?) Obviously ;) the ENOSPC (-28) error number in linux USB is taken to be (#define) USB_ST_BANDWIDTH_ERROR which is returned when kernel believes there is not sufficiently bandwidth available to submit the urb/data. Anyway. Moved the AirStar 2 to a different USB port and hey presto it works! :-) In some posting from late 2005 it was said that the kernel's USB bandwidth estimator is somewhat buggy and should be disabled in a kernel compile. Well in 2.6.21 the estimator still seems buggy, but now the option to disable it has been disabled. Duh! :-) Still not quite sure why, with the same 4-port USB 2.0 hub having keyboard, wireless mouse (both very high speed of course ;) and then USB1.1 AirStar 2 attached makes the linux kernel think there's not enough bandwidth. In WinXP the same configuration works fine. Anyway, AirStar on different USB port in Linux seems to work now. Phew. - Jan _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
