[Bug 1958224] Re: brltty claiming cp210x devices on 22.04
Sebastien Bacher
1958224 at bugs.launchpad.net
Thu May 12 14:29:15 UTC 2022
We should review how the package works but meanwhile the udev rules
change is going to resolve the conflict
** Description changed:
+ * Impact
+
+ The brltty udev rules are claiming generic devices IDs which makes some
+ other devices like Arduino cards not able to interact with the serial
+ port anymore
+
+ * Test Case
+
+ Try to use an Arduino over a cp210x or FTDI serial port, it should be
+ able to talk to the computer
+
+ * Regression potential
+
+ There are some braille devices on the market using generic IDs which are
+ going to stop working out of the box. Those devices are uncommon and
+ it's arguably an hardware bugs they are using those IDs.
+
+ -------------------
+
Distributor ID: Ubuntu
Description: Ubuntu Jammy Jellyfish (development branch)
Release: 22.04
Codename: jammy
brltty: Installed: 6.4-2ubuntu1
- brltty appears once again to be claiming cp210x devices with the
+ brltty appears once again to be claiming cp210x devices with the
vendor/product ID of:
idVendor=10c4, idProduct=ea60
Example dmesg output:
- 999.215968] usb 3-6.3: New USB device found, idVendor=10c4, idProduct=ea60, bcdDevice= 1.00
+ 999.215968] usb 3-6.3: New USB device found, idVendor=10c4, idProduct=ea60, bcdDevice= 1.00
[ 999.215973] usb 3-6.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 999.215975] usb 3-6.3: Product: CP2103 USB to UART Bridge
[ 999.215977] usb 3-6.3: Manufacturer: Silicon Labs
[ 999.215978] usb 3-6.3: SerialNumber: 0005
[ 999.234070] usbcore: registered new interface driver usbserial_generic
[ 999.234081] usbserial: USB Serial support registered for generic
[ 999.235262] usbcore: registered new interface driver cp210x
[ 999.235272] usbserial: USB Serial support registered for cp210x
[ 999.235298] cp210x 3-6.3:1.0: cp210x converter detected
[ 999.237039] usb 3-6.3: cp210x converter now attached to ttyUSB0
[ 999.300049] input: PC Speaker as /devices/platform/pcspkr/input/input41
[ 999.807223] input: BRLTTY 6.4 Linux Screen Driver Keyboard as /devices/virtual/input/input42
[ 999.991926] usb 3-6.3: usbfs: interface 0 claimed by cp210x while 'brltty' sets config #1
[ 999.995045] cp210x ttyUSB0: cp210x converter now disconnected from ttyUSB0
[ 999.995066] cp210x 3-6.3:1.0: device disconnected
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https://bugs.launchpad.net/bugs/1958224
Title:
brltty claiming cp210x devices on 22.04
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