[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1611532
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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Title:
Bernd Porr, the next step is to fully commit bisect from kernel 3.13 to
4.4 in order to identify the last good kernel commit, followed
immediately by the first bad one. This will allow for a more expedited
analysis of the root cause of your issue. Could you please do this
following
** Project changed: linux => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Changed in: linux (Ubuntu)
Importance: Undecided => High
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Not that I'm aware of. I had 32bit and 64bit versions running and it was
fine. Though I did most development under 32bit prior to 16.04 but some
also under 64bit.
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Bernd Porr, to clarify, was this problem reproducible in a x64 (not
32-bit) Ubuntu release prior to 16.04?
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Title:
bluetooth USB dongle CSR8510
** Tags removed: kernel-bug-exists-upstream-4.8-rc1
** Tags added: kernel-bug-exists-upstream-4.8-rc4
** Tags added: kernel-bug-exists-upstream
** Tags added: regression-release
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Just tested with 4.8-rc4: no ethernet, no bluetooth at all and graphics
defaults to VGA only.
Booted back to the stock ubuntu xenial kernel and bluetooth/network is back up
running.
Looks to me like a massive regression.
All tested on an X220 laptop.
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Bernd Porr, to keep this relevant to upstream, one would want to test
the latest mainline kernel (now 4.8-rc4) as it is released.
Could you please advise?
** Tags added: bios-outdated-1.42 kernel-bug-exists-upstream-4.8-rc1
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
Tested with a:
Bus 001 Device 005: ID 0a5c:217f Broadcom Corp. BCM2045B (BDC-2.1)
on
4.8.0-rc1+ #1 SMP Fri Aug 12 15:49:49 BST 2016 x86_64 x86_64 x86_64 GNU/Linux
which works fine if the datarate is not too high (approx 50kbps) but becomes
unreliable at higher data rates.
Decive discovery is
I've checked out the kernel from git and it's exactly the same issue:
4.8.0-rc1+ #1 SMP Fri Aug 12 15:49:49 BST 2016 x86_64 x86_64 x86_64 GNU/Linux
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I confirm the issue with the Broadcom 20702A0 bluetooth 4 dongle,
exactly as described. Also tested with earlier kernels on Debian and
Ubuntu systems. No possibility of reliable usage over bluetooth.
I would greatly appreciate this bug being given attention. We have a
University lab full of Linux
** Also affects: linux
Importance: Undecided
Status: New
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Title:
bluetooth USB dongle CSR8510 causes system freeze
To manage
Tested on:
Linux bp1-ThinkPad-X220 4.8.0-040800rc1-generic #201608072231 SMP Mon Aug 8
02:33:57 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
The rfcomm connection is as unreliable as before.
I've attached a file where I transmit comma separated data from a bluetooth
device. The data is corrupted
debian 4.5.3-2 686 pae 32bit tested with Broadcam 20702A0.
rfcomm scan works
rfcomm bind works
cat /dev/rfcomm0 produces no output and directly returns with zero output.
putty on /dev/rfcomm0 closes the connection after a couple of seconds
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Also tested with Broadcom 20702A0 bluetooth 4 dongle.
Similar problem: here at low bitrates a bit more stable but loses connection
after a while plus data corruption but no fatal crash.
Tested with kernel version: 4.5.4-1 and 4.6.0-1 both 64 bit.
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Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.8 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix
bp1@bp1-ThinkPad-X220:~/sandbox/rfcomm$ ./btscan
00:1F:CC:F4:25:E1 SGH-J700
00:06:66:7D:A9:D3 GN-ATTYS
bp1@bp1-ThinkPad-X220:~/sandbox/rfcomm$ ./btscan
00:06:66:7D:A9:D3 [unknown]
00:1F:CC:F4:25:E1 SGH-J700
bp1@bp1-ThinkPad-X220:~/sandbox/rfcomm$
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