driver pl2303 doesn't detect device after upgrade
Hi, after upgrade from 3.16 to 3.17.2 this device isn't in lsusb output after plugging in : Bus 004 Device 002: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port (driver pl2303, usb to serial converter) The only way how to make it functional is to boot machine with connected device. But after unlug/plug the device disappeared and isn't detected again. (Probably a found once more non-functional device (USB keyboard) that wasn't detected but I thinked that problem is in keyboard...) Some other devices work fine (USB modem, flashdisk). Workaround is to downgrade to the kernel 3.16. System: debian unstable, selfcompiled vanilla, Thinkpad X61x Best regards, -- Milan Kocian -- To unsubscribe from this list: send the line unsubscribe linux-usb in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: driver pl2303 doesn't detect device after upgrade
On Thu, Nov 13, 2014 at 10:17:07AM +0100, Milan Kocian wrote: Hi, after upgrade from 3.16 to 3.17.2 this device isn't in lsusb output after plugging in : Bus 004 Device 002: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port (driver pl2303, usb to serial converter) The only way how to make it functional is to boot machine with connected device. But after unlug/plug the device disappeared and isn't detected again. (Probably a found once more non-functional device (USB keyboard) that wasn't detected but I thinked that problem is in keyboard...) Some other devices work fine (USB modem, flashdisk). Workaround is to downgrade to the kernel 3.16. System: debian unstable, selfcompiled vanilla, Thinkpad X61x Are there any kernel log messages when you plug the device in? thanks, greg k-h -- To unsubscribe from this list: send the line unsubscribe linux-usb in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: driver pl2303 doesn't detect device after upgrade
On Thu, Nov 13, 2014 at 07:44:20AM -0800, Greg KH wrote: On Thu, Nov 13, 2014 at 10:17:07AM +0100, Milan Kocian wrote: Hi, after upgrade from 3.16 to 3.17.2 this device isn't in lsusb output after plugging in : Bus 004 Device 002: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port (driver pl2303, usb to serial converter) The only way how to make it functional is to boot machine with connected device. But after unlug/plug the device disappeared and isn't detected again. (Probably a found once more non-functional device (USB keyboard) that wasn't detected but I thinked that problem is in keyboard...) Some other devices work fine (USB modem, flashdisk). Workaround is to downgrade to the kernel 3.16. System: debian unstable, selfcompiled vanilla, Thinkpad X61x Are there any kernel log messages when you plug the device in? thanks, greg k-h No. -- Milan Kocian -- To unsubscribe from this list: send the line unsubscribe linux-usb in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: driver pl2303 doesn't detect device after upgrade
On Thu, Nov 13, 2014 at 04:59:32PM +0100, Milan Kocian wrote: On Thu, Nov 13, 2014 at 07:44:20AM -0800, Greg KH wrote: On Thu, Nov 13, 2014 at 10:17:07AM +0100, Milan Kocian wrote: Hi, after upgrade from 3.16 to 3.17.2 this device isn't in lsusb output after plugging in : Bus 004 Device 002: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port (driver pl2303, usb to serial converter) The only way how to make it functional is to boot machine with connected device. But after unlug/plug the device disappeared and isn't detected again. (Probably a found once more non-functional device (USB keyboard) that wasn't detected but I thinked that problem is in keyboard...) Some other devices work fine (USB modem, flashdisk). Workaround is to downgrade to the kernel 3.16. System: debian unstable, selfcompiled vanilla, Thinkpad X61x Are there any kernel log messages when you plug the device in? thanks, greg k-h No. Nothing at all? That indicates that the hub isn't powered on at all, so it's an electrical issue? Very confused... greg k-h -- To unsubscribe from this list: send the line unsubscribe linux-usb in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: driver pl2303 doesn't detect device after upgrade
On Thu, Nov 13, 2014 at 08:06:05AM -0800, Greg KH wrote: On Thu, Nov 13, 2014 at 04:59:32PM +0100, Milan Kocian wrote: On Thu, Nov 13, 2014 at 07:44:20AM -0800, Greg KH wrote: On Thu, Nov 13, 2014 at 10:17:07AM +0100, Milan Kocian wrote: Hi, after upgrade from 3.16 to 3.17.2 this device isn't in lsusb output after plugging in : Bus 004 Device 002: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port (driver pl2303, usb to serial converter) The only way how to make it functional is to boot machine with connected device. But after unlug/plug the device disappeared and isn't detected again. (Probably a found once more non-functional device (USB keyboard) that wasn't detected but I thinked that problem is in keyboard...) Some other devices work fine (USB modem, flashdisk). Workaround is to downgrade to the kernel 3.16. System: debian unstable, selfcompiled vanilla, Thinkpad X61x Are there any kernel log messages when you plug the device in? thanks, greg k-h No. Nothing at all? That indicates that the hub isn't powered on at all, so it's an electrical issue? Very confused... greg k-h Yes, nothing at all. But when I connect other device to the same port (e.g USB gsm modem) it's detected, so I don't think its electrical issue. Yes, it's very confused. Initially I thinked that USB-serial convertor is dead so I tried it for sure in another machine but it works. Then I remembered non-functional USB keyboard and began to look at the problem :-). And result is that problem is in new kernel. I can try patches, enable some debug options but you must say what to try :-). (I am not USB expert). Best regards and thanks for your answer, -- Milan Kocian -- To unsubscribe from this list: send the line unsubscribe linux-usb in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
