I have the same issue with the current Debian Buster kernel using an Acer Aspire 5930G both with suspension and the hibernation; I'm using the following kernel: $uname -a Linux debian 4.19.0-2-amd64 #1 SMP Debian 4.19.16-1 (2019-01-17) x86_64 GNU/Linux
After suspension or hibernation, the network connection is not re-established with a NO-CARRIER error. A first work-around is to unload and reload the sky2 kernel driver with the folllowing commands: modprobe -r sky2 modprobe sky2 It seems a kernel bug and it is discussed, for example, in this Ubuntu bug report: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1798921 In this message (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1798921/comments/28) the author suggests (on Debian) to start the kernel with the following parameters to work-around the bug: pci=nomsi,noaer I have tried and it works.