Bug#897276: libc6: Device file with cu command becomes unresponsive due to libc6 update
Package: libc6
Version: 2.24-11+deb9u3
Severity: normal
Dear Maintainer,
*** Reporter, please consider answering these questions, where appropriate ***
* What led up to the situation?
Updating libc6 version from 2.24-11+deb9u1 to 2.24-11+deb9u3, the device file became nonresponsive.
* What exactly did you do (or not do) that was effective (or
ineffective)?
+ libc6(2.24-11+deb9u1) install and cu command (AT Input , OK response) : This is the result I'm expecting.
------------
root@obsiot:~# dpkg -i libc6_2.24-11+deb9u1_amd64.deb
dpkg: warning: downgrading libc6:amd64 from 2.24-11+deb9u3 to 2.24-11+deb9u1
(Reading database ... 9994 files and directories currently installed.)
Preparing to unpack libc6_2.24-11+deb9u1_amd64.deb ...
Unpacking libc6:amd64 (2.24-11+deb9u1) over (2.24-11+deb9u3) ...
Setting up libc6:amd64 (2.24-11+deb9u1) ...
Processing triggers for libc-bin (2.24-11+deb9u3) ...
root@obsiot:~# cu -s 115200 -l /dev/ttyUSB0
Connected.
OK
~.
Disconnected.
------------
+ libc6(2.24-11+deb9u3) install and cu command (AT Input , No response) : This is the result I do not want.
------------
root@obsiot:~# dpkg -i libc6_2.24-11+deb9u3_amd64.deb
(Reading database ... 9994 files and directories currently installed.)
Preparing to unpack libc6_2.24-11+deb9u3_amd64.deb ...
Unpacking libc6:amd64 (2.24-11+deb9u3) over (2.24-11+deb9u1) ...
Setting up libc6:amd64 (2.24-11+deb9u3) ...
Processing triggers for libc-bin (2.24-11+deb9u3) ...
root@obsiot:~# cu -s 115200 -l /dev/ttyUSB0
Connected.
~.
Disconnected.
------------
* What was the outcome of this action?
As mentioned above, no response was made when updating was done.
However, not all devices are affected. Only some devices are affected.
root@obsiot:~# lsusb
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 10c4:ea60 Cygnal Integrated Products, Inc. CP210x UART Bridge / myAVR mySmartUSB light
Bus 001 Device 004: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 003: ID 0bda:0821 Realtek Semiconductor Corp.
Bus 001 Device 002: ID 10c4:ea60 Cygnal Integrated Products, Inc. CP210x UART Bridge / myAVR mySmartUSB light <-- Error Device
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
* What outcome did you expect instead?
As with the 2.24-11+deb9u1 version, I expect that OK will be returned after entering the AT command to the device file.
*** End of the template - remove these template lines ***
-- System Information:
Debian Release: 9.4
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 4.9.82 (SMP w/2 CPU cores)
Locale: LANG=C, LC_CTYPE=ja_JP.UTF-8 (charmap=UTF-8), LANGUAGE=C (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages libc6 depends on:
ii libgcc1 1:6.3.0-18+deb9u1
libc6 recommends no packages.
Versions of packages libc6 suggests:
ii debconf [debconf-2.0] 1.5.61
pn glibc-doc <none>
ii libc-l10n 2.24-11+deb9u3
ii locales 2.24-11+deb9u3
-- debconf information excluded
Reply to: