I have same issue here in 2019.
01:04.0 Network controller: Intel Corporation PRO/Wireless LAN 2100 3B Mini PCI Adapter (rev 04)
M3N notebook
4.15.0-51-generic Ubuntu 18.04.2 LTS
a lot of:
[11414.173675] ipw2100: Fatal interrupt. Scheduling firmware restart. [12674.408121] ipw2100: Fatal interrupt. Scheduling firmware restart.
[64189.132057] ipw2100: wlp1s4: Firmware did not initialize. [64189.132061] ipw2100: wlp1s4: Failed to start the firmware.
I have same issue here in 2019.
01:04.0 Network controller: Intel Corporation PRO/Wireless LAN 2100 3B Mini PCI Adapter (rev 04)
M3N notebook
4.15.0-51-generic
Ubuntu 18.04.2 LTS
a lot of:
[11414.173675] ipw2100: Fatal interrupt. Scheduling firmware restart.
[12674.408121] ipw2100: Fatal interrupt. Scheduling firmware restart.
[64189.132057] ipw2100: wlp1s4: Firmware did not initialize.
[64189.132061] ipw2100: wlp1s4: Failed to start the firmware.