They joys of bugs in hardware or firmware[1]:
A user reported updating to #Linux #kernel 6.4.y broke #iwlwifi on a Intel 3165 NIC. Bisection identified 5fc3f6c90cc ("r8169: consolidate disabling ASPM before EPHY access") as culprit.
Turns out it was not a faulty bisection, as it seems enabling #ASPM on some #Realtek chips supported by #r8169 can harm other PCI devices. 🥴 🤨
https://bugzilla.kernel.org/show_bug.cgi?id=217635#c27
[1] or maybe it one day turns out that this is caused by a bug somewhere in the #LinuxKernel
#linux #kernel #iwlwifi #aspm #realtek #r8169 #linuxkernel