[Trisquel-users] Re : Disconnection from network after waking computer from sleep

[lcerf]

I assume you still have the desired kernel installed. Otherwise, install it  
again. You must then boot that kernel: choose it in the "Advanced options" of  
the GRUB menu... but a user and a password will be asked: the user is "grub"  
and the password is at the very end of the output of 'sudo cat  
/etc/grub.d/01_PASSWORD', to be executed in a terminal. But you had better  
get rid of that useless password (GRUB's developers say so!):  
https://trisquel.info/forum/updating-error#comment-117506

Then, remove the newer kernels, e.g., using the "Synaptic Package Manager" in  
the "System Settings".  The configuration of GRUB (which is used!) will be  
automatically updated: the most recent kernel boots by default.