On Mon, Apr 15, 2013 at 10:23:08AM +0200, Karsten Malcher wrote: > Hi, > > Am 14.04.2013 16:01, schrieb Greg KH: > >On Sun, Apr 14, 2013 at 11:42:06AM +0200, Karsten Malcher wrote: > >>please have a look at my last email in the bug report. > >>http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=704242 > >> > >>Do you have an idea what's maybe the difference that this adapter is working with kernel 2.6.32 ? > >Lots of things have changed from 2.6.32 to 3.2. > > Yes - unfortunately and fortunately. :-) > > > > >Can you build your own kernels to test? If so, can you do a bisection > >between those kernel releases to try to track down when things broke? > > No sorry - at this time i only have an idea of the goal of it. > Maybe there are additional ideas at the debian team. > > >That's going to be the best/only way to try to figure this out. > > I worried you will write somethnig like this. > > Do you think it is something different in the driver itself or in the > interaction of the driver and kernel? Right now, I do not know, sorry. > When i look at the debug output of the opened working port i would > say there is a polling for reading data about every 100 µs. > http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=42;filename=usingport.log;att=3;bug=704242 > > [ 1749.073740] /build/buildd-linux-2.6_2.6.32-38-amd64-bk66e4/linux-2.6-2.6.32/debian/build/source_amd64_none/drivers/usb/serial/pl2303.c: pl2303_chars_in_buffer - returns 0 > [ 1749.073833] /build/buildd-linux-2.6_2.6.32-38-amd64-bk66e4/linux-2.6-2.6.32/debian/build/source_amd64_none/drivers/usb/serial/pl2303.c: pl2303_chars_in_buffer - returns 0 > > I didn't see something like this in kernel 3.2.0 ? You should, but note, that's userspace, or the line discipline asking for this, but we might have tty changes that have cleaned this up so we aren't so "chatty" anymore. If you can't do the bisection, can you point me at the exact device you are using here so I can buy one and try to track this down? thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
