Libor, any ideas? On Mon, Feb 28, 2011 at 12:39:53PM +0000, bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=30072 > > Summary: USB-to-serial problems in 2.6.37.1+ (pl2303) > Product: Drivers > Version: 2.5 > Kernel Version: 2.6.37.1 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: high > Priority: P1 > Component: USB > AssignedTo: greg@xxxxxxxxx > ReportedBy: akwatts@xxxxxxxxx > Regression: Yes > > > As of 2.6.37.1, using a pl2303 usb<->serial converter (trendnet tu-s9) > connected to an external serial modem fails on re-connect > (disconnect -> connect cycle). > > Sometimes, after disconnecting ppp (either with SIGKILL, SIGTERM, or SIGHUP) > and trying to reconnect, wvdial (the dialer) uses 100% of cpu and hangs at > the following lines: > > wvdial: WvDial: Internet dialer version 1.61 > wvdial: Initializing modem. > wvdial: Sending: ATZ [sometimes hangs at previous line] > > This behavior is noticed most when the ppp line remains open but the > connection has died (upstream). A keep-alive type script detects that > the line is effectively dead and tries to restart ppp. > > I've identified the commit which causes this behavior as: > > commit d14fc1a74e846d7851f24fc9519fe87dc12a1231 > Author: Libor Pechacek <lpechacek@xxxxxxx> > Date: Fri Jan 14 14:30:21 2011 +0100 > USB: serial: handle Data Carrier Detect changes > > Backing this commit out returns the system to normal behavior and the > pl2303-driven modem can disconnect/reconnect without issues. > > ~ Andy > > -- > Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email > ------- You are receiving this mail because: ------- > You are the assignee for the bug. -- 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
