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[Vladimir Hulagov <vhulagov@xxxxxxxxx>]

Same issue with Gembird KB-316BT on Ubuntu 15.04.

Error reproduces on fresh compiled kernel 4.4.0-rc8+ from git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git
and 4.5.0-rc1+ from Torvalds repository.
And bluez ver. 5.37.

In dmesg after keyboard was connected:
[121633.384618] calling  hidp_init+0x0/0x20 [hidp] @ 16917
[121633.384628] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
[121633.384638] Bluetooth: HIDP socket layer initialized
[121633.384648] initcall hidp_init+0x0/0x20 [hidp] returned 0 after 14 usecs
[121633.386807] hid-generic 0005:04E8:7021.001C: unknown main item tag 0x0
[121633.387265] input: Bluetooth v3.0 keyboard as /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/bluetooth/hci0/hci0:768/0005:04E8:7021.001C/input/input40
[121633.388196] hid-generic 0005:04E8:7021.001C: input,hidraw4: BLUETOOTH HID v0.01 Keyboard [Bluetooth v3.0 keyboard] on 7c:7a:91:eb:67:f6

strace for bluetoothd stuck on:
10:28:39.270670 read(3, "\3\0\0\0\0\0\0\0", 16) = 8
10:28:39.275259 write(3, "\1\0\0\0\0\0\0\0", 8) = 8
10:28:39.275588 read(8, "\21\0\0\0\10\0\220_\25&,\334\0\5", 512) = 14
10:28:39.275915 write(3, "\1\0\0\0\0\0\0\0", 8) = 8
10:28:39.276167 write(3, "\1\0\0\0\0\0\0\0", 8) = 8
10:28:39.276386 write(3, "\1\0\0\0\0\0\0\0", 8) = 8
10:28:39.276603 write(3, "\1\0\0\0\0\0\0\0", 8) = 8
10:28:39.276866 poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=11, events=POLLIN}, {fd=12, events=POLLIN}, {fd=13, events=POLLIN}, {fd=16, events=POLLIN}, {fd=18, events=POLLIN}, {fd=21, events=0}, {fd=20, events=POLLIN}, {fd=19, events=POLLIN}, {fd=23, events=0}, {fd=17, events=POLLIN}, {fd=9, events=POLLIN}, {fd=24, events=POLLIN}, {fd=7, events=POLLIN}, {fd=25, events=0}, {fd=14, events=POLLIN}, {fd=15, events=POLLIN}, {fd=26, events=0}, {fd=26, events=POLLOUT}, {fd=8, events=POLLIN}, {fd=22, events=POLLIN}], 22, 4294967295) = 1 ([{fd=3, revents=POLLIN}])
10:28:39.277599 read(3, "\5\0\0\0\0\0\0\0", 16) = 8
10:28:39.281864 poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=11, events=POLLIN}, {fd=12, events=POLLIN}, {fd=13, events=POLLIN}, {fd=16, events=POLLIN}, {fd=18, events=POLLIN}, {fd=21, events=0}, {fd=20, events=POLLIN}, {fd=19, events=POLLIN}, {fd=23, events=0}, {fd=17, events=POLLIN}, {fd=9, events=POLLIN}, {fd=24, events=POLLIN}, {fd=7, events=POLLIN}, {fd=25, events=0}, {fd=14, events=POLLIN}, {fd=15, events=POLLIN}, {fd=26, events=0}, {fd=26, events=POLLOUT}, {fd=8, events=POLLIN}, {fd=22, events=POLLIN}], 22, 4294967295

When keyboard connected and Caps Lock was pressed, but if i turn off the
keyboard strace shows fall of POLLIN/POLLOUT events in infinite cycle...

debugfs shows events with lag from 3 to 20 sec:
$ cat /sys/kernel/debug/hid/0005:04E8:7021.0026/events
report (size 8) (numbered) =  03 6a dc 2c 26 15 5f 90
GenericDeviceControls.BatteryStrength = 106
 00
Keyboard.00e0 = 0
Keyboard.00e1 = 0
Keyboard.00e2 = 0
Keyboard.00e3 = 0
Keyboard.00e4 = 0
Keyboard.00e5 = 0
Keyboard.00e6 = 0
Keyboard.00e7 = 0
Keyboard.0017 = 0

but wireshark continue recieving characters without any lag from
bluetooth (bnep0) after issue occur, so i suggest that problem not in
btintel/btusb kernel modules subsystem, but in hid-core probably.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to bluez in Ubuntu.
https://bugs.launchpad.net/bugs/1341256

Title:
  Press caps lock on bluetooth keyboard then the keyboard go death

Status in bluez package in Ubuntu:
  Confirmed

Bug description:
  I am typing using the Apple wireless keyboard,When I press 'caps lock',the keyboard don't work any more!
  So I go use keyboard on the Macbook.The key case have change,but the light on the key do not light on.
  I have to off the bluetooth then make it on again.Then reconnect the wireless keyboard.
  Yes,It work again.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: bluez 4.101-0ubuntu13
  ProcVersionSignature: Ubuntu 3.16.0-3.8-generic 3.16.0-rc4
  Uname: Linux 3.16.0-3-generic x86_64
  NonfreeKernelModules: wl nvidia
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Jul 13 17:12:23 2014
  InstallationDate: Installed on 2014-03-08 (126 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140307)
  InterestingModules: bnep rfcomm btusb bluetooth
  MachineType: Apple Inc. MacBookPro9,1
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-3-generic.efi.signed root=UUID=6510f595-2f49-4798-953a-ed186346c60d ro irqpoll
  SourcePackage: bluez
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/08/2012
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP91.88Z.00D3.B08.1208081132
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-4B7AC7E43945597E
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookPro9,1
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-4B7AC7E43945597E
  dmi.modalias: dmi:bvnAppleInc.:bvrMBP91.88Z.00D3.B08.1208081132:bd08/08/2012:svnAppleInc.:pnMacBookPro9,1:pvr1.0:rvnAppleInc.:rnMac-4B7AC7E43945597E:rvrMacBookPro9,1:cvnAppleInc.:ct10:cvrMac-4B7AC7E43945597E:
  dmi.product.name: MacBookPro9,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.
  hciconfig:
   hci0:	Type: BR/EDR  Bus: USB
   	BD Address: 7C:D1:C3:79:A7:25  ACL MTU: 1021:8  SCO MTU: 64:1
   	UP RUNNING PSCAN 
   	RX bytes:119665 acl:5720 sco:0 events:2443 errors:0
   	TX bytes:13420 acl:640 sco:0 commands:718 errors:0

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