I am on 20.04, kernel "5.4.0-33-generic". I also see this problem. The easiest way to trigger it is to run an ADSL speed test, then the system freezes at random for several seconds and the iwlwifi log messages are the same as the initial bug report.
I had the problem in the past on 19.10, kept it at bay sticking to a 5.0 kernel kept from a 19.04 install. After months the problem went away, it's not clear with which kernel. I just booted on a new kernel by mistake and the system worked properly. A few days ago the problem resurfaced on 19.10, and my old 5.0 kernel was not working anymore. Sometimes I stay weeks or months without rebooting... I tried upgrading to 20.04 but it did not help. I tried fresh installs of Fedora 32 and Ubuntu 20.04, and in both cases the live boot did not have the issue but the system after install did, but *mostly* after enabling Nvidia drivers. My problem is that I need CUDA so Nvidia drivers are a must for me. What is working now is symlinking "iwlwifi-9260-th-b0-jf-b0-46.ucode" to "iwlwifi-9260-th-b0-jf-b0-34.ucode" as described in a previous comment. I did not even have to download "iwlwifi-9260-th-b0-jf-b0-34.ucode", I already had it in place. Setting "11n_disable=1" made the issue smaller but did not eliminate it, and the resulting network slowdown was unacceptable. Trying "backport-iwlwifi-dkms" did not help either. At this point this is a fresh install of 20.04 and the only workaround I have is the firmware downgrade. I am available for testing experimental "backport-iwlwifi-dkms" versions if needed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1848921 Title: iwlwifi firmware crashes intel 9260ac [8086:2526] subsystem [8086:0010] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1848921/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
