IWO's questions

I'm using ubuntu 15.10, kernel version 4.2.0-25. My laptop is Dell Inspiron 14-3452

The problem is that I can't turn bluetooth back on once I disable it. The only way to turn enable it is to reboot.

rfkill list

shows no soft block or hard block

sudo hciconfig hci0 up

returns

Can't init device hci0: Connection timed out (110)

ifconfig shows the hci0 bluetooth device, but when I type in lsusb it doesn't show any bluetooth devices

$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0bda:5683 Realtek Semiconductor Corp. 
Bus 001 Device 005: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 004: ID 0bda:b739 Realtek Semiconductor Corp. 
Bus 001 Device 002: ID 05e3:0608 Genesys Logic, Inc. Hub
Bus 001 Device 006: ID 148f:5372 Ralink Technology, Corp. RT5372 Wireless Adapter
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

dmesg | grep Bluetooth returns

dmesg | grep Bluetooth
[    2.673842] usb 1-2.1: Product: Bluetooth Radio 
[    5.317495] Bluetooth: Core ver 2.20
[    5.317534] Bluetooth: HCI device and connection manager initialized
[    5.317541] Bluetooth: HCI socket layer initialized
[    5.317548] Bluetooth: L2CAP socket layer initialized
[    5.317558] Bluetooth: SCO socket layer initialized
[    5.530006] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[    5.530012] Bluetooth: BNEP filters: protocol multicast
[    5.530020] Bluetooth: BNEP socket layer initialized
[    5.673210] Bluetooth: hci0: rtl: examining hci_ver=06 hci_rev=000b lmp_ver=06 lmp_subver=8723
[    5.673218] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_fw.bin
[    5.675249] Bluetooth: hci0: rom_version status=0 version=1
[    8.617443] Bluetooth: RFCOMM TTY layer initialized
[    8.617460] Bluetooth: RFCOMM socket layer initialized
[    8.617474] Bluetooth: RFCOMM ver 1.11
[ 3627.862044] Bluetooth: hci0: rtl: examining hci_ver=06 hci_rev=000b lmp_ver=06 lmp_subver=8723
[ 3627.862047] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_fw.bin
[ 3627.862911] Bluetooth: hci0: rom_version status=0 version=1
[ 6283.018539] Bluetooth: hci0 urb ffff880147d5c840 failed to resubmit (113)
[ 6360.048608] Bluetooth: hci0 urb ffff8801438f6900 failed to resubmit (113)
[ 7193.045144] Bluetooth: hci0 urb ffff880143bebc00 failed to resubmit (113)
[ 7596.035702] Bluetooth: hci0 urb ffff8801438c03c0 failed to resubmit (113)

I've tried rfkill unblock bluetooth, editing /etc/rc.local and nothing works.

I've been using 14.04 LTS for the last few weeks and have just updated to 15.10 CMUS had been working fine on 14.04, but ever since I upgraded, it just doesn't work.

I've installed and removed cmus several times, but I can't get it to start.

I'm on Ubuntu 15.10 and I've installed packages related to vaapi shown on this link How do I enable hardware accelerated video in VLC with Intel HD 4000 GPU?

I've tried playing a 1080p vid (H264-MPEG-4 AVC). And on gnome-system-monitor I see vlc using about 16~20% of cpu. Does this mean that Hardware acceleration is enabled on vlc? I'd like to know if there is a way to check if hardware acceleration is working

the settings related to codec and video output on vlc are set to automatic

here is my vainfo output

libva info: VA-API version 0.38.0
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_0_38
libva info: va_openDriver() returns 0
vainfo: VA-API version: 0.38 (libva 1.6.0)
vainfo: Driver version: Intel i965 driver for Intel(R) CherryView - 1.6.0
vainfo: Supported profile and entrypoints
      VAProfileMPEG2Simple            : VAEntrypointVLD
      VAProfileMPEG2Simple            : VAEntrypointEncSlice
      VAProfileMPEG2Main              : VAEntrypointVLD
      VAProfileMPEG2Main              : VAEntrypointEncSlice
      VAProfileH264ConstrainedBaseline: VAEntrypointVLD
      VAProfileH264ConstrainedBaseline: VAEntrypointEncSlice
      VAProfileH264Main               : VAEntrypointVLD
      VAProfileH264Main               : VAEntrypointEncSlice
      VAProfileH264High               : VAEntrypointVLD
      VAProfileH264High               : VAEntrypointEncSlice
      VAProfileH264MultiviewHigh      : VAEntrypointVLD
      VAProfileH264MultiviewHigh      : VAEntrypointEncSlice
      VAProfileH264StereoHigh         : VAEntrypointVLD
      VAProfileH264StereoHigh         : VAEntrypointEncSlice
      VAProfileVC1Simple              : VAEntrypointVLD
      VAProfileVC1Main                : VAEntrypointVLD
      VAProfileVC1Advanced            : VAEntrypointVLD
      VAProfileNone                   : VAEntrypointVideoProc
      VAProfileJPEGBaseline           : VAEntrypointVLD
      VAProfileJPEGBaseline           : VAEntrypointEncPicture
      VAProfileVP8Version0_3          : VAEntrypointVLD
      VAProfileVP8Version0_3          : VAEntrypointEncSlice
      VAProfileH264MultiviewHigh      : VAEntrypointVLD
      VAProfileH264MultiviewHigh      : VAEntrypointEncSlice
      VAProfileH264StereoHigh         : VAEntrypointVLD
      VAProfileH264StereoHigh         : VAEntrypointEncSlice
      VAProfileHEVCMain               : VAEntrypointVLD