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December 10, 2016 00:40
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Reload drivers for my intel wireless card automatically if it hangs (on suspend/resume)
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| #!/bin/sh | |
| lock=/var/run/lock/iwl-reset.lock | |
| fail_msg='iwlwifi 0000:00:00.0: Failed to load firmware chunk!' | |
| do_reset=' | |
| echo "Resetting wifi..." | |
| rmmod iwlmvm | |
| rmmod iwlwifi | |
| modprobe iwlwifi | |
| modprobe iwlmvm | |
| sleep 2 | |
| ' | |
| dmesg --kernel --notime --follow --level=err \ | |
| | while read msg; do | |
| if [ X"$msg" = X"$fail_msg" ]; then | |
| echo 'Wifi appears hung' | |
| flock -xn "$lock" -c "$do_reset" & | |
| fi | |
| done |
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I could just always {un,re}load the driver on suspend/resume, but sometimes it actually comes back and doesn't need to be reset.