You have been subscribed to a public bug:
- Do a rfcomm bind.
- Try a cat /dev/rfcomm0
In about 50% of cases the system completely freezes. In the other 40% the
rfcomm data is garbled. In the remaining 10% the data is fine.
The bt device at the other end is an RN42 which transmits text data.
When scanning for devices often the bt name is not displayed or is shown
as unknown.
It worked perfectly under the previous LTS (precise) which was a 32 bit
version.
The xenial I'm using now is a 64bit version.
I've tried it on two computers and the behaviour is the same (both 64
bit versions)
Description: Ubuntu 16.04.1 LTS
Release: 16.04
Linux bp1-ThinkPad-X220 4.4.0-34-generic #53-Ubuntu SMP Wed Jul 27
16:06:39 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-31-generic 4.4.0-31.50 [modified:
boot/vmlinuz-4.4.0-31-generic]
ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
Uname: Linux 4.4.0-34-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: bp1 3466 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Aug 9 22:57:18 2016
HibernationDevice: RESUME=UUID=8159b870-9b8b-418d-ba7f-681dacd3fb94
InstallationDate: Installed on 2016-07-24 (16 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
MachineType: LENOVO 4291SX7
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-34-generic
root=UUID=a4df6be3-87d1-4a4f-8576-2c3fc031806e ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.4.0-34-generic N/A
linux-backports-modules-4.4.0-34-generic N/A
linux-firmware 1.157.2
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/18/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 8DET69WW (1.39 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4291SX7
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr8DET69WW(1.39):bd07/18/2013:svnLENOVO:pn4291SX7:pvrThinkPadX220:rvnLENOVO:rn4291SX7:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4291SX7
dmi.product.version: ThinkPad X220
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: amd64 apport-bug bios-outdated-1.42 kernel-bug-exists-upstream
kernel-bug-exists-upstream-4.8-rc4 needs-bisect regression-release xenial
--
bluetooth USB dongle CSR8510 causes system freeze
https://bugs.launchpad.net/bugs/1611532
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