Hi, Since 3.8 s2ram on btrfs system lead to hang.
Could not save a trace will try to get a few picture but trace are similar to : https://github.com/docker/docker/issues/15654 and https://patchwork.kernel.org/patch/8352811/ It is 100% reproducible. mount table /dev/mapper/portable2015--bastien--vg-HOME on /var/cache/pbuilder type btrfs (rw,relatime,lazytime,compress=zlib,space_cache,subvolid=934,subvol=/pbuilder) /dev/mapper/portable2015--bastien--vg-HOME on /home type btrfs (rw,nosuid,nodev,relatime,lazytime,compress=zlib,space_cache,subvolid=933,subvol=/home) btrfs is over dm-crypt Bastien