Following this recipe from Matthew Garrett seems to have solved it:
>> echo RESUME=/dev/whatever | sudo tee /etc/mkinitramfs/conf.d/resume
>>
>> replacing /dev/whatever with the name of
>> your swap partition. You'll
>> then need to do
>>
>> sudo update-initramfs
>>
It turned out that I started using espresso install for both Flight 6 and Beta, so that's when my hibernate stopped working.
Following this recipe from Matthew Garrett seems to have solved it:
>> echo RESUME= /dev/whatever | sudo tee /etc/mkinitramf s/conf. d/resume
>>
>> replacing /dev/whatever with the name of
>> your swap partition. You'll
>> then need to do
>>
>> sudo update-initramfs
>>
It turned out that I started using espresso install for both Flight 6 and Beta, so that's when my hibernate stopped working.