I run a Thinkpad T460p with an Intel 9260ac wifi card. 19.04 ran great.
I upgraded to 19.10 (and I get the same from the live version) and as soon as there is any significant traffic on the wifi, the system goes to a crawl, freezes, unfreezes and then the trackpad/trackpoint become choppy and I will have to open a terminal (outside X) and reboot.
Initially I thought this was a hardware error. After all that's how the log starts:
Oct 20 01:51:16 weywot kernel: iwlwifi 0000:03:00.0: Start IWL Error Log Dump:
But wifi is flawless in windows, and works fine with 19.04.
So I went for the firmware. There are 5 iwlwifi-9260-th-b0-jf-b0-XX files in /lib/firmware, and firmware loads ok.
I was able to find newer versions of firmware and try them all. I was able to upgrade the Bios and this limited the problem to a rather (and relatively) harmless error as in this log.
Trying individual files I found the .34 version to stop the problem altogether, so at least I now have my system working again.
Has anyone had problems with 19.10 and the 9260ac wifi?
The main part of the problem is that this exists as soon as I boot the Live version (and as such I can only install when wifi is off, otherwise it crashes).
Any advice/input would be welcome. Thanks.