Ubuntu

  1. Bug #1976534
  2. Activity log

Activity log for bug #1976534

Date Who What changed Old value New value Message
2022-06-01 16:47:37 Yuri Yorick bug added bug
2022-06-01 16:48:56 Yuri Yorick summary /dev/ttyUSB0 file disappears on Ubuntu 22.04 /dev/ttyUSB0 doesn't appear (fresh Ubuntu 22.04)
2022-06-01 16:49:30 Yuri Yorick summary /dev/ttyUSB0 doesn't appear (fresh Ubuntu 22.04) /dev/ttyUSB0 doesn't appear for an FTDI (fresh Ubuntu 22.04)
2022-06-01 16:49:39 Yuri Yorick summary /dev/ttyUSB0 doesn't appear for an FTDI (fresh Ubuntu 22.04) /dev/ttyUSB0 doesn't appear for an FTDI on fresh Ubuntu 22.04
2022-06-01 20:22:50 Ubuntu Foundations Team Bug Bot tags bot-comment
2022-06-04 15:09:01 Yuri Yorick description Hi all, This problem appeared on a freshly installed Ubuntu 22.04 desktop. When I'm attaching a ftdi device into usb everything looks great but there's no /dev/ttyUSB0 file. Looks like it's created and then disappears immediately. I tried to remove brltty package (as some recommends https://bugs.launchpad.net/ubuntu/+source/brltty/+bug/1958224) but it didn't help. The same ftdi device works on older Ubuntu version w/o any problems. So hardware is ok. I'm having this in syslog: Jun 1 16:58:09 qgs-comp kernel: [ 538.642086] usb 2-1.5: new full-speed USB device number 5 using ehci-pci Jun 1 16:58:10 qgs-comp kernel: [ 538.756437] usb 2-1.5: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00 Jun 1 16:58:10 qgs-comp kernel: [ 538.756445] usb 2-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Jun 1 16:58:10 qgs-comp kernel: [ 538.756448] usb 2-1.5: Product: USB Serial Jun 1 16:58:10 qgs-comp kernel: [ 538.756450] usb 2-1.5: Manufacturer: FTDI Jun 1 16:58:10 qgs-comp kernel: [ 538.756452] usb 2-1.5: SerialNumber: FT0KKBIF Jun 1 16:58:10 qgs-comp kernel: [ 538.759677] ftdi_sio 2-1.5:1.0: FTDI USB Serial Device converter detected Jun 1 16:58:10 qgs-comp kernel: [ 538.759713] usb 2-1.5: Detected FT232RL Jun 1 16:58:10 qgs-comp kernel: [ 538.760546] usb 2-1.5: FTDI USB Serial Device converter now attached to ttyUSB0 Jun 1 16:58:01 qgs-comp colord-sane: message repeated 2 times: [ io/hpmud/musb.c 2101: Invalid usb_open: Permission denied] Jun 1 16:58:10 qgs-comp mtp-probe: checking bus 2, device 5: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5" Jun 1 16:58:10 qgs-comp mtp-probe: bus: 2, device: 5 was not an MTP device Jun 1 16:58:10 qgs-comp systemd-udevd[5394]: 2-1.5: Failed to create/update device symlink '/dev/ttyUSB0', ignoring: File exists Jun 1 16:58:10 qgs-comp snapd[942]: hotplug.go:199: hotplug device add event ignored, enable experimental.hotplug Jun 1 16:58:10 qgs-comp mtp-probe: checking bus 2, device 5: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5" Jun 1 16:58:10 qgs-comp mtp-probe: bus: 2, device: 5 was not an MTP device Jun 1 16:58:10 qgs-comp colord-sane: io/hpmud/musb.c 2101: Invalid usb_open: Permission denied I noticed this line: Jun 1 16:58:10 qgs-comp systemd-udevd[5394]: 2-1.5: Failed to create/update device symlink '/dev/ttyUSB0', ignoring: File exists Why is it happening? There's no /dev/ttyUSB0 neither before nor after I attach ftdi device to a USB port. Hi all, This problem appeared on a freshly installed Ubuntu 22.04 desktop. When I'm attaching a ftdi device into usb everything looks great but there's no /dev/ttyUSB0 file. Looks like it's created and then disappears immediately. I tried to remove brltty package (as some recommends https://bugs.launchpad.net/ubuntu/+source/brltty/+bug/1958224) but it didn't help. The same ftdi device works on older Ubuntu version w/o any problems. So hardware is ok. I'm having this in syslog: Jun 1 16:58:09 qgs-comp kernel: [ 538.642086] usb 2-1.5: new full-speed USB device number 5 using ehci-pci Jun 1 16:58:10 qgs-comp kernel: [ 538.756437] usb 2-1.5: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00 Jun 1 16:58:10 qgs-comp kernel: [ 538.756445] usb 2-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Jun 1 16:58:10 qgs-comp kernel: [ 538.756448] usb 2-1.5: Product: USB Serial Jun 1 16:58:10 qgs-comp kernel: [ 538.756450] usb 2-1.5: Manufacturer: FTDI Jun 1 16:58:10 qgs-comp kernel: [ 538.756452] usb 2-1.5: SerialNumber: FT0KKBIF Jun 1 16:58:10 qgs-comp kernel: [ 538.759677] ftdi_sio 2-1.5:1.0: FTDI USB Serial Device converter detected Jun 1 16:58:10 qgs-comp kernel: [ 538.759713] usb 2-1.5: Detected FT232RL Jun 1 16:58:10 qgs-comp kernel: [ 538.760546] usb 2-1.5: FTDI USB Serial Device converter now attached to ttyUSB0 Jun 1 16:58:01 qgs-comp colord-sane: message repeated 2 times: [ io/hpmud/musb.c 2101: Invalid usb_open: Permission denied] Jun 1 16:58:10 qgs-comp mtp-probe: checking bus 2, device 5: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5" Jun 1 16:58:10 qgs-comp mtp-probe: bus: 2, device: 5 was not an MTP device Jun 1 16:58:10 qgs-comp systemd-udevd[5394]: 2-1.5: Failed to create/update device symlink '/dev/ttyUSB0', ignoring: File exists Jun 1 16:58:10 qgs-comp snapd[942]: hotplug.go:199: hotplug device add event ignored, enable experimental.hotplug Jun 1 16:58:10 qgs-comp mtp-probe: checking bus 2, device 5: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5" Jun 1 16:58:10 qgs-comp mtp-probe: bus: 2, device: 5 was not an MTP device Jun 1 16:58:10 qgs-comp colord-sane: io/hpmud/musb.c 2101: Invalid usb_open: Permission denied I noticed this line: Jun 1 16:58:10 qgs-comp systemd-udevd[5394]: 2-1.5: Failed to create/update device symlink '/dev/ttyUSB0', ignoring: File exists Why is it happening? There's no /dev/ttyUSB0 neither before nor after I attach ftdi device to a USB port. Let's take a look in /dev/serial folder: cd /dev/serial ; ls -LR .: by-id by-path ./by-id: ls: cannot access './by-id/usb-FTDI_USB_Serial_FT0KKBIF-if00-port0': No such file or directory usb-FTDI_USB_Serial_FT0KKBIF-if00-port0 ./by-path: ls: cannot access './by-path/pci-0000:00:1d.0-usb-0:1.5:1.0-port0': No such file or directory pci-0000:00:1d.0-usb-0:1.5:1.0-port0 So the folders and links are there but there's no /dev/ttyUSB0 file the links point to.