Can't suspend on Lenovo X230t

[Bartosz Woronicz]

[ 7587.134384] Restarting tasks ... done.
[ 7587.144139] video LNXVIDEO:00: Restoring backlight state
[ 7587.144578] PM: Syncing filesystems ... done.
[ 7587.167631] PM: Preparing system for freeze sleep
[ 7587.167782] Freezing user space processes ...
[ 7601.412906] atkbd serio0: Unknown key pressed (translated set 2, code 0xd9 on isa0060/serio0).
[ 7601.412910] atkbd serio0: Use 'setkeycodes e059 <keycode>' to make it known.
[ 7601.413785] atkbd serio0: Unknown key released (translated set 2, code 0xd9 on isa0060/serio0).
[ 7601.413788] atkbd serio0: Use 'setkeycodes e059 <keycode>' to make it known.
[ 7601.413937] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment

[ 7607.185993] Freezing of tasks failed after 20.005 seconds (1 tasks refusing to freeze, wq_busy=0):
[ 7607.186039] alsa-sink-USB A D ffff88040746fc68 0 1915 1555 0x00000004
[ 7607.186042] ffff88040746fc68 ffff88040741ebf0 0000000000014240 ffff88040746ffd8
[ 7607.186044] 0000000000014240 ffff88040bed89d0 ffff88040741ebf0 ffff88040746fcb8
[ 7607.186045] ffff88040ba9c000 ffff88040746fca8 00000001001be522 ffff88040ba9c000
[ 7607.186047] Call Trace:
[ 7607.186054] [<ffffffff817c7519>] schedule+0x29/0x70
[ 7607.186056] [<ffffffff817caa3e>] schedule_timeout+0x14e/0x280
[ 7607.186060] [<ffffffff810dd730>] ? internal_add_timer+0x80/0x80
[ 7607.186076] [<ffffffffc03003d2>] snd_power_wait+0xb2/0x100 [snd]
[ 7607.186078] [<ffffffff810a3080>] ? wake_up_state+0x20/0x20
[ 7607.186081] [<ffffffff8120a2f0>] ? poll_select_copy_remaining+0x130/0x130
[ 7607.186085] [<ffffffffc0527807>] snd_pcm_common_ioctl1+0x297/0xcb0 [snd_pcm]
[ 7607.186088] [<ffffffffc0528333>] snd_pcm_playback_ioctl1+0x113/0x260 [snd_pcm]
[ 7607.186091] [<ffffffffc05284b4>] snd_pcm_playback_ioctl+0x34/0x40 [snd_pcm]
[ 7607.186093] [<ffffffff812096a0>] do_vfs_ioctl+0x2e0/0x4e0
[ 7607.186096] [<ffffffff811f5a5e>] ? vfs_read+0x11e/0x140
[ 7607.186098] [<ffffffff81209921>] SyS_ioctl+0x81/0xa0
[ 7607.186100] [<ffffffff817cbe8d>] system_call_fastpath+0x16/0x1b

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: systemd 219-7ubuntu6
ProcVersionSignature: Ubuntu 3.19.0-30.34-generic 3.19.8-ckt6
Uname: Linux 3.19.0-30-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.5
Architecture: amd64
Date: Wed Oct 7 20:32:49 2015
ExecutablePath: /lib/systemd/systemd
InstallationDate: Installed on 2015-05-20 (139 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
MachineType: LENOVO 34352NG
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-30-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro splash vt.handoff=7
SourcePackage: systemd
UdevLog: Error: [Errno 2] Nie ma takiego pliku ani katalogu: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/09/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: GCETA2WW (2.62 )
dmi.board.asset.tag: Not Available
dmi.board.name: 34352NG
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrGCETA2WW(2.62):bd04/09/2015:svnLENOVO:pn34352NG:pvrThinkPadX230Tablet:rvnLENOVO:rn34352NG:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 34352NG
dmi.product.version: ThinkPad X230 Tablet
dmi.sys.vendor: LENOVO