If it's any bit of helpful information, I occasionally have this issue (on 18.04) and it is fixed by a proper shutdown and boot. It seems to happen for me when one of the servers that I sshfs to crashes/becomes unavailable (or something else server side) and the issue persists past the time in which the server is back and functional.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1702368 Title: Mounted sshfs filesystems sometimes prevent suspend Status in gnome-settings-daemon package in Ubuntu: Confirmed Status in linux package in Ubuntu: Triaged Status in sshfs-fuse package in Ubuntu: Confirmed Bug description: Using Ubuntu artful with linux-image-4.10.0-26-generic 4.10.0-26.30 and sshfs 2.8-1. I use "sshfs -o reconnect" and often run gvim against a file on an sshfs filesystem. Sometimes when I suspend I get: Jul 4 20:59:08 xps kernel: [46684.608740] PM: Syncing filesystems ... done. Jul 4 20:59:08 xps kernel: [46684.613278] PM: Preparing system for sleep (mem) Jul 4 20:59:08 xps kernel: [46684.613788] Freezing user space processes ... Jul 4 20:59:08 xps kernel: [46704.620140] Freezing of tasks failed after 20.006 seconds (1 tasks refusing to freeze, wq_busy=0): Jul 4 20:59:08 xps kernel: [46704.620534] gvim D 0 11155 1336 0x00000004 Jul 4 20:59:08 xps kernel: [46704.620541] Call Trace: Jul 4 20:59:08 xps kernel: [46704.620556] __schedule+0x233/0x6f0 ... Jul 4 20:59:08 xps kernel: [46704.620679] entry_SYSCALL_64_fastpath+0x1e/0xad ... Jul 4 20:59:08 xps kernel: [46704.620711] Restarting tasks ... done. ...and the system fails to suspend. AFAICT, this is https://bugzilla.redhat.com/show_bug.cgi?id=656992 and https://lists.debian.org/debian-kernel/2011/10/msg00412.html has an extensive explanation. The corresponding Debian bug was closed long ago due to inactivity. It isn't exactly bug 388419 though since that is about behaviour after resume, rather than failure to suspend. This affects sshfs-fuse, but it sounds like a full fix would be in the kernel. I wonder if it's possible to work around in userspace packaging in sshfs-fuse, though, by arranging some action in userspace before suspend? It seems unlikely that this will be addressed any time soon, but it'd be nice to keep a bug open in Launchpad so that users can have a single rallying point. --- ApportVersion: 2.20.5-0ubuntu5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: robie 1519 F.... pulseaudio CurrentDesktop: GNOME DistroRelease: Ubuntu 17.10 HibernationDevice: RESUME=UUID=ae23a431-2f44-4c12-992a-a0da8186bfcc InstallationDate: Installed on 2017-05-11 (54 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170507) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 0bda:568b Realtek Semiconductor Corp. Bus 001 Device 002: ID 0cf3:e300 Atheros Communications, Inc. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Dell Inc. XPS 13 9360 Package: sshfs-fuse ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.10.0-26-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 4.10.0-26.30-generic 4.10.17 RelatedPackageVersions: linux-restricted-modules-4.10.0-26-generic N/A linux-backports-modules-4.10.0-26-generic N/A linux-firmware 1.167 Tags: artful Uname: Linux 4.10.0-26-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip libvirt lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 01/18/2017 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.3.2 dmi.board.name: 00GCYR dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.3.2:bd01/18/2017:svnDellInc.:pnXPS139360:pvr:rvnDellInc.:rn00GCYR:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: XPS 13 9360 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1702368/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp