On Mon, 8 Jun 2009, Jiri Kosina wrote: > [ added linux-usb to CC and kept the whole original mail for reference ] > > On Mon, 8 Jun 2009, Jonathan Cervidae wrote: > > > While at first the easy fix to this issue would be "Don't remove modem", > > sometimes it resets itself and therefore appears to disconnect and > > reconnect which causes the system crash. > > What is the product ID of the device? (lsusb will tell you). > > > I can reproduce the problem 80% of the time by ripping the modem out of > > the USB port. However, if I kill -9 pppd before doing it, it never > > happens so the problem appears to be an interaction between pppd and the > > kernel. As full system lockups in my limited knowledge must be kernel > > problems since systems should never fully lock (with flashing caps lock > > and scroll lock lights, not responsive to magic sysreq keys) presumably > > this is a kernel bug. > > > > It also did not happen until recently, some point within the last month. I > > would have reported it earlier (and reverted to a kernel that didn't do it) > > but didn't realise why it was happening. Two patches for usb-serial drivers were posted recently to fix this sort of problem: http://marc.info/?l=linux-usb&m=124395806322087&w=2 http://marc.info/?l=linux-usb&m=124395806222085&w=2 See if the two of them together solve everything. Alan Stern -- 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
