Since the installation of the kernel 4.2.0_34 and later, my Ubuntu does not work properly.
It hangs during start, or short after login. I found this message in the system.log:
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970170] ------------[ cut here ]------------
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970188] WARNING: CPU: 0 PID: 3142 at /build/linux-qsdjht/linux-4.2.0/fs/block_dev.c:57 __blkdev_put+0xbf/0x250()
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970191] Modules linked in: nls_iso8859_1 pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) drbg ansi_cprng ctr ccm binfmt_misc rfcomm bnep snd_hrtimer uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common ath3k btusb arc4 ath9k videodev btrtl btbcm ath9k_common btintel bluetooth ath9k_hw media intel_rapl ath snd_hda_codec_hdmi mac80211 intel_soc_dts_iosf intel_powerclamp snd_hda_codec_realtek snd_hda_codec_generic coretemp snd_hda_intel snd_hda_codec punit_atom_debug cfg80211 snd_hda_core crct10dif_pclmul snd_hwdep hp_wmi sparse_keymap crc32_pclmul snd_pcm snd_seq_midi snd_seq_midi_event input_leds joydev snd_rawmidi serio_raw cryptd snd_seq kvm_intel snd_seq_device snd_timer kvm snd mei_txe lpc_ich soundcore shpchp mei wmi hp_wireless intel_smartconnect mac_hid parport_pc ppdev lp parport autofs4 uas usb_storage i915 psmouse i2c_algo_bit drm_kms_helper r8169 drm mii ahci libahci video
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970290] CPU: 0 PID: 3142 Comm: umount Tainted: G OE 4.2.0-38-generic #45-Ubuntu
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970293] Hardware name: Hewlett-Packard HP 250 G2 Notebook PC/2190, BIOS F.1A 12/04/2014
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970297] 0000000000000286 00000000e8188e49 ffff880178d97d98 ffffffff817f250e
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970303] 0000000000000000 ffffffff81cbfce8 ffff880178d97dd8 ffffffff8107cae6
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970308] 0000000000000000 ffff880078dd5380 ffff880078dd54f8 ffff880078dd5470
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970313] Call Trace:
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970323] [<ffffffff817f250e>] dump_stack+0x63/0x81
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970331] [<ffffffff8107cae6>] warn_slowpath_common+0x86/0xc0
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970335] [<ffffffff8107cc1a>] warn_slowpath_null+0x1a/0x20
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970339] [<ffffffff8123b7af>] __blkdev_put+0xbf/0x250
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970344] [<ffffffff8123bdf0>] blkdev_put+0x50/0x120
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970350] [<ffffffff81202861>] kill_block_super+0x41/0x70
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970354] [<ffffffff81202ba3>] deactivate_locked_super+0x43/0x70
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970358] [<ffffffff81202ff4>] deactivate_super+0x64/0x70
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970364] [<ffffffff81220873>] cleanup_mnt+0x43/0x90
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970368] [<ffffffff81220912>] __cleanup_mnt+0x12/0x20
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970373] [<ffffffff8109a5f3>] task_work_run+0x73/0x90
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970381] [<ffffffff81015f09>] do_notify_resume+0x69/0x70
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970386] [<ffffffff817f95c4>] int_signal+0x12/0x17
Jun 23 17:52:34 florian-HP-250-G2-Notebook-PC kernel: [ 305.970390] ---[ end trace 427c1d4aa86831c9 ]---
With the Kernel 4.2.0_30 I can work without any problems.
Here some additional Informations:
florian@florian-HP-250-G2-Notebook-PC:~$ lsb_release -rd
Description: Ubuntu 15.10
Release: 15.10
Hardware: HP-250-G2-Notebook
Not sure how this has to do with openal-soft.