Created attachment 1511510[details]
dmesg log cut-out
I have a Dell Latitude 7350 with an Intel Wireless-AC 7265 adapter.
Wi-Fi works as expected after the system is booted, until it is first suspended. When the system resumes, the iwlwifi driver throws this kernel warning (dmesg cut-out is attached):
Timeout waiting for hardware access (CSR_GP_CNTRL 0xffffffff)
Then Wi-Fi will no longer works until the system is rebooted; unloading and reloading the iwlmvm/iwlwifi modules does not seem to help anything.
This behavior is fully consistent when using any kernel version 4.19.y packaged for Fedora 28 (including 4.19.6-200 in updates-testing). By downgrading to kernel version 4.18.18, the problem completely disappears.
Kernel package maintainers:
Please let me know what additional information you need to triage this issue. If you would prefer I can try to reproduce this with Fedora 29, Fedora Rawhide, and/or Arch Linux using a live DVD.
I'm finding this regression to be disruptive for day-to-day use of my laptop. I have to reboot it any time it goes to sleep. I'm honestly surprised I haven't come across other reports of this yet, because the Intel Wi-Fi chipset is very common.
Thank you.
Created attachment 1511510 [details] dmesg log cut-out I have a Dell Latitude 7350 with an Intel Wireless-AC 7265 adapter. Wi-Fi works as expected after the system is booted, until it is first suspended. When the system resumes, the iwlwifi driver throws this kernel warning (dmesg cut-out is attached): Timeout waiting for hardware access (CSR_GP_CNTRL 0xffffffff) Then Wi-Fi will no longer works until the system is rebooted; unloading and reloading the iwlmvm/iwlwifi modules does not seem to help anything. This behavior is fully consistent when using any kernel version 4.19.y packaged for Fedora 28 (including 4.19.6-200 in updates-testing). By downgrading to kernel version 4.18.18, the problem completely disappears.