I encountered this iwlwifi failure while testing the Intel 9260 with the AMD Ryzen 7 2700x (8 core, 16 thread). By bisecting the kernel, I was able to narrow it down to the same commit. I can also verify that setting maxcpus=15, fixes wifi (at the cost of performance).
This is a really important fix for certain System76 products. We'd really like to see it backported so Ubuntu works without compromises on our machines. I'm happy to test any testing or proposed kernels. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1805088 Title: iwlwifi fails to work on 16 or more logical CPUs machines Status in HWE Next: New Status in linux package in Ubuntu: Fix Committed Status in linux source package in Bionic: In Progress Bug description: [Impact] Got dmesg kernel BUG while loading iwlwifi driver on machines which has 16 or more logical CPUs kernel: RIP: 0010:iwl_pcie_rxq_alloc_rbs+0x1d0/0x1f0 [iwlwifi] And it leads to wifi can't scan any APs, and leads to system hangs while suspending. [Fix] Below commit contained in v4.17 fix the issue. ab1068d6866e iwlwifi: pcie: compare with number of IRQs requested for, not number of CPUs [Regression Potential] Low. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1805088/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
