on Obuntu 20 LTS the same bug also exists, but with slightly different
symptoms, see bug
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1905994
#1905994
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note, as visible in the dmesg log, IO attempts with another unrelated
USB device (the USB stick ubuntu had previously booted from) failed,
causing IO errors, as the entire USB subsystem was down.
this is also why I had to submit this bug with "ubuntu-bug" prior to
actually causing the bug and uplo
adding dmesg log of the OOOPS
note that the behavior differs from bug #1905782 on Ubuntu 18.
On Ubuntu 18 no OOPS is triggered, instead the driver enters an endless
loop when the USB device gets disconnected later
On Ubuntu 20 a kernel OOPS is generated and takes the whole USB stack
with it. pas
Public bug reported:
attempting to reproduce bug
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1905782 on ubuntu
20.04.1 LTS yields a kernel OOOPS / page fault in the USB cdc_acm driver.
will upload OOOPs shortly.
steps to reproduce:
1. boot ubuntu 20.04.1 LTS (In this case from live CD
I do not get any of these Microcode SW error detected errors with
backport-iwlwifi-dkms and the wifi is stable.
That being said, I did not encounter any more wifi breakdowns recently. Since
they were sporadic to begin with, I cannot say for certain when they stopped
happening, but with the curr
Public bug reported:
When plugging in a USB device on Ubuntu 18.04 that offers a virtual
modem/com port (typically /dev/ttyACM0) then the "modemmanager" service
will try to configure this modem/serial port automatically without user
interaction, setting dtr/rts parameters.
However sometimes USB m
After a bit of searching I found this kernel bug which looks related, from last
year.
The symptoms are the same, and the error is extremely similar, but for a
slightly different chip/firmware combination handled by the same driver
https://bugzilla.kernel.org/show_bug.cgi?id=204167
Therefore I g
Public bug reported:
Ever since the previous to last apt-get upgrade, my wifi has become very
unstable.
After a few minutes to every few hours, the WIFI connection becomes
completely unresponsive with any further packets timing out, and any
attempt to (re-)connect to any AP being impossible.
Wif
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