On Kubuntu 18.04 with 4.15.0-32-generic running an Intel Wireless 7265 with the iwlwifi driver (driverversion=4.15.0-32-generic), suspend-to-RAM followed by wakeup will kill wireless the second time. The first suspend/wakeup is OK, but the second time, the Networks box (from clicking the network icon on the toolbar) shows nothing, neither my router nor any other routers in my neighborhood.
In the past, when I've had problems like this, I sometimes could get it to work by turning on airplane mode (in the Networks box) and turning it off again, or trying other controls in the Networks box. But nothing like this works anymore.
Assuming this is some kind of driver issue and I need to wait for a fix, is there a quick workaround (short of rebooting) I can use in the meantime? For instance, I see a process:
$ ps aux | grep wifi
root 482 0.0 0.0 0 0 ? S 11:09 0:03 [irq/131-iwlwifi]
Is there some kind of signal I can send to this process ("sudo kill SIGwhatever 482") or some other mechanism to reset the driver so it starts up again without having to reboot?
In the past, when I've had problems like this, I sometimes could get it to work by turning on airplane mode (in the Networks box) and turning it off again, or trying other controls in the Networks box. But nothing like this works anymore.
Assuming this is some kind of driver issue and I need to wait for a fix, is there a quick workaround (short of rebooting) I can use in the meantime? For instance, I see a process:
$ ps aux | grep wifi
root 482 0.0 0.0 0 0 ? S 11:09 0:03 [irq/131-iwlwifi]
Is there some kind of signal I can send to this process ("sudo kill SIGwhatever 482") or some other mechanism to reset the driver so it starts up again without having to reboot?
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