** Attachment added: "lspci-vnvn.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1465808/+attachment/4415784/+files/lspci-vnvn.log
-- 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/1465808 Title: Hibernation fails due to a non-reachable cifs mount Status in linux package in Ubuntu: Incomplete Bug description: This happened twice during the last weeks with different kernel versions on Kubuntu 15.04 (latest kernel images released). Steps taken: 1) Mount cifs: sudo mount -t cifs -ouser=admin //x.y.z.a/video /home/packi/video/ 2) Watch movies (VLC startet using dolphin) 3) Hibernate 4) Wake-up at work (server no longer reachable) 5) Try to hibernate at work after 9 hours Output of dmesg: [224051.133206] PM: Syncing filesystems ... done. [224051.174400] PM: Preparing system for freeze sleep [224051.174567] Freezing user space processes ... [224071.207476] Freezing of tasks failed after 20.008 seconds (1 tasks refusing to freeze, wq_busy=0): [224071.207529] dolphin D ffff880320a0b968 0 31153 1787 0x00000004 [224071.207532] ffff880320a0b968 ffff8802799a93a0 0000000000014200 ffff880320a0bfd8 [224071.207534] 0000000000014200 ffff88046c2d93a0 ffff8802799a93a0 0000000020a0b948 [224071.207536] ffff8800648c79b8 ffff8800648c79bc ffff8802799a93a0 00000000ffffffff [224071.207538] Call Trace: [224071.207545] [<ffffffff817c54e9>] schedule_preempt_disabled+0x29/0x70 [224071.207548] [<ffffffff817c73a5>] __mutex_lock_slowpath+0x95/0x100 [224071.207550] [<ffffffff817c7433>] mutex_lock+0x23/0x40 [224071.207566] [<ffffffffc0b89f90>] SendReceive+0x90/0x310 [cifs] [224071.207570] [<ffffffffc0b637f5>] ? smb_init+0x45/0x60 [cifs] [224071.207575] [<ffffffffc0b63a54>] CIFSSMBNegotiate+0x114/0x6c0 [cifs] [224071.207583] [<ffffffffc0b92f33>] cifs_negotiate+0x43/0x60 [cifs] [224071.207589] [<ffffffffc0b73e9f>] cifs_negotiate_protocol+0x7f/0xe0 [cifs] [224071.207593] [<ffffffffc0b634c2>] cifs_reconnect_tcon+0xb2/0x320 [cifs] [224071.207598] [<ffffffffc0b637de>] smb_init+0x2e/0x60 [cifs] [224071.207603] [<ffffffffc0b6a51a>] CIFSSMBUnixQPathInfo+0x7a/0x300 [cifs] [224071.207609] [<ffffffffc0b82446>] cifs_get_inode_info_unix+0x86/0x200 [cifs] [224071.207614] [<ffffffff811fd8e1>] ? complete_walk+0x51/0x100 [224071.207616] [<ffffffff81203180>] ? path_lookupat+0x60/0xc90 [224071.207619] [<ffffffff811d68c9>] ? __kmalloc+0x1c9/0x280 [224071.207624] [<ffffffffc0b76156>] ? build_path_from_dentry+0xb6/0x2c0 [cifs] [224071.207629] [<ffffffffc0b76156>] ? build_path_from_dentry+0xb6/0x2c0 [cifs] [224071.207635] [<ffffffffc0b84abc>] cifs_revalidate_dentry_attr+0xbc/0x200 [cifs] [224071.207641] [<ffffffffc0b84cb5>] cifs_getattr+0x55/0x130 [cifs] [224071.207643] [<ffffffff811f85bc>] vfs_getattr_nosec+0x2c/0x40 [224071.207644] [<ffffffff811f867d>] vfs_getattr+0x2d/0x40 [224071.207646] [<ffffffff811f8754>] vfs_fstatat+0x64/0xa0 [224071.207647] [<ffffffff811f8c22>] SYSC_newlstat+0x22/0x40 [224071.207649] [<ffffffff811f8e6e>] SyS_newlstat+0xe/0x10 [224071.207652] [<ffffffff817c990d>] system_call_fastpath+0x16/0x1b The task in question is hanging and can't be killed by -KILL or -TERM. I also couldn't umount the mount using 'umount -f'. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1465808/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp