On Saturday 19 of January 2013, Arkadiusz Miskiewicz wrote: > On Saturday 19 of January 2013, Greg Kroah-Hartman wrote: > > On Fri, Jan 18, 2013 at 11:28:43PM +0100, Arkadiusz Miskiewicz wrote: > > > Hi. > > > > > > Using 3.7.3 kernel and connecting two rs232 usb adapters, CP2102 and > > > FT232RL, one after disconnecting another. > > > > > > After few cycles of reconnecting and using socat (below) I'm getting > > > problems accessing ttyUSB0: > > > ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or > > > TCGETS, 0x7fffb70c6ae0) = -1 ENOTTY (Inappropriate ioctl for device) > > > > > > Unloading and reloading (by udev) modules ftdio_sio, cp210x, usbserial > > > doesn't help. I have to reboot to get ttyUSB0 working (regardless of > > > which driver, ftdio_sio or cp210x is handling ttyUSB0 - both stop > > > working). > > > > > > Any clues? > > > > The kernel log shows the device getting removed a bunch and then coming > > back, which implies electrical issues (flaky connection, low power, > > etc.) Are you really removing it and plugging it back in? Or is it > > doing it all by itself? > > I was doing plug in CP2102, remove it, plug in FT232RL after few seconds, > remove it, plug in CP... (and various variations, several times) and > testing with socat before removing devices. After some iteration the > problem appears and only reboot helps. The issue is really weird. Machine is Thinkpad T400 2764CTO (latest bios). When the problem happened on 3.7.3 today I rebooted into 3.8rc4 and ... freshly after reboot and plugging in PL2303 adapter the problem was already there. Didn't have to do unplug/plug cycle to make it happen. Looks like sometimes reboot cures the problem, sometimes it doesn't. Now powered off laptop and powered it on - problem gone. Connected PL2303, ran socat, disconnected PL2303 (while socat was running) -> problem happened again. Looks like it doesn't depend on adapter chip type. So to reproduce here: - boot fresh 3.8rc4 - plug in some adapter (PL2303 for example) - run "socat -ddd -s -u /dev/ttyUSB0,raw,echo=0,b115200,crnl,noctty,nonblock - | logger" - it should run fine, without any error - disconnect adapter; socat should exit with error "W cannot restore terminal settings on fd 3: Input/output error" - plug in adapter again - run socat again -> this time error "E tcgetattr(3, 0x7fff21411780): Inappropriate ioctl for device" immediately always; regardless which adapter is used and if kernel module drivers for these adapters were reloaded dmesg: http://pastebin.com/r1Q5mmgt config: http://pastebin.com/8dpFFzuU lspci: http://pastebin.com/TBtUg1tW lsusb: http://pastebin.com/SueVw9CD [ 53.776047] usb 4-1: new full-speed USB device number 2 using uhci_hcd [ 53.938053] usb 4-1: New USB device found, idVendor=067b, idProduct=2303 [ 53.938060] usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 53.938065] usb 4-1: Product: USB-Serial Controller [ 53.938068] usb 4-1: Manufacturer: Prolific Technology Inc. [ 53.949924] usbcore: registered new interface driver usbserial [ 53.950364] usbcore: registered new interface driver usbserial_generic [ 53.951147] usbserial: USB Serial support registered for generic [ 53.954268] usbcore: registered new interface driver pl2303 [ 53.955009] usbserial: USB Serial support registered for pl2303 [ 53.955039] pl2303 4-1:1.0: pl2303 converter detected [ 53.967394] usb 4-1: pl2303 converter now attached to ttyUSB0 [ 64.492122] usb 4-1: USB disconnect, device number 2 [ 64.501748] pl2303 ttyUSB0: pl2303 converter now disconnected from ttyUSB0 [ 64.502343] pl2303 4-1:1.0: device disconnected [ 66.494930] usb 4-1: new full-speed USB device number 3 using uhci_hcd [ 66.654247] usb 4-1: New USB device found, idVendor=067b, idProduct=2303 [ 66.654261] usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 66.654269] usb 4-1: Product: USB-Serial Controller [ 66.654276] usb 4-1: Manufacturer: Prolific Technology Inc. [ 66.659661] pl2303 4-1:1.0: pl2303 converter detected [ 66.671587] usb 4-1: pl2303 converter now attached to ttyUSB0 5722 munmap(0x7f1bfc0d7000, 4096) = 0 5722 write(2, "2013/01/19 09:36:38 socat[5722] E tcgetattr(3, 0x7fffeff64020): Inappropriate ioctl for device\n", 95) = 95 5722 ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, 0x7fffeff63e50) = -1 ENOTTY (Inappropriate ioctl for device) 5722 write(2, "2013/01/19 09:36:38 socat[5722] E tcgetattr(3, 0x7fffeff63f90): Inappropriate ioctl for device\n", 95) = 95 5722 ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, 0x7fffeff63ec0) = -1 ENOTTY (Inappropriate ioctl for device) 5722 write(2, "2013/01/19 09:36:38 socat[5722] E tcgetattr(3, 0x7fffeff64160): Inappropriate ioctl for device\n", 95) = 95 5722 fcntl(3, F_SETFD, FD_CLOEXEC) = 0 5722 ioctl(1, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, 0x7fffeff64330) = -1 ENOTTY (Inappropriate ioctl for device) 5722 select(4, [3], [1], [], NULL) = 2 (in [3], out [1]) -- Arkadiusz Miśkiewicz, arekm / maven.pl -- 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
