3.13.0-65 upgrade vs. usb serial adapter

[Gawarmel]

  affects ubuntu

Hi there,

I'm using Kubuntu 14.04 32bit and 64bit on two different machines. Doing
embedded programming on a daily base, I'm using USB to serial adapters
based on the CP2102 IC. No problem so far. Today (September 29th) I
upgraded both computers from 3.13.0-63 to 3.13.0-65 as usual with this
command and passwd:

sudo apt-get update && sudo apt-get upgrade -y && sudo apt-get
dist-upgrade -y

After this and reboot, on both machines none of my several USB-serial
Adapters seem to work properly. I can receive with e.g. cutecom, but I
cannot send anymore. Any help will be apppreciated.

Thanks Andreas

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1500860/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Chris L8 (ekpyroticfrood)]

To resolve your issue temporarily reboot, and at the "GNU GRUB" menu select "Advanced options for Ubuntu" and then move down to select the Ubuntu, with Linux 3.13.0-63-generic kernel option. (NOT the recovery mode one) and it should boot into the old kernel and work fine again.

If you want to make the change permanent either you will have to modify the grub menu,
or remove the new kernel with:

sudo apt-get remove linux-image-3.13.0-65-generic

and reboot,
which will remove the new kernel and remove it from GRUB.

[Dave Rove (daver1730)]

Affects Olimex CH340 USB-to-serial chips too.

Reverting to 3.13.0-63 restores normal function.

[Flo (spam01)]

Similar issue here - i own a RFXTRX device which internally uses a FTDI USB/serial converter. After update to kernel 3.13.0-65, the software which uses the RFXTRX device ( FHEM ) stops working and hangs while reading from it.

[Chris L8 (ekpyroticfrood)]

Based on this thread, it looks like the fix is on the way:
https://<email address hidden>/msg137245.html
but I don't know how long these things take to go "live".

[facchinm (fukc87)]

I'm reporting here that also Arduino community is being affected ( https://github.com/arduino/Arduino/issues/3923 )
We had one report in 15 days with the bug out but I fear the number will grow as soon as people update their kernels