This bug was fixed in the package linux-oem - 4.15.0-1043.48
---------------
linux-oem (4.15.0-1043.48) bionic; urgency=medium
[ Ubuntu: 4.15.0-52.56 ]
* Remote denial of service (resource exhaustion) caused by TCP SACK scoreboard
manipulation (LP: #1831638)
- SAUCE: tcp: tcp_fragment() should apply sane memory limits
* Remote denial of service (system crash) caused by integer overflow in TCP
SACK handling (LP: #1831637)
- SAUCE: tcp: limit payload size of sacked skbs
-- Stefan Bader <stefan.ba...@canonical.com> Fri, 14 Jun 2019 10:39:16
+0200
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https://bugs.launchpad.net/bugs/1831065
Title:
does not detect headphone when there is no other output devices
Status in HWE Next:
New
Status in linux package in Ubuntu:
Invalid
Status in linux-oem package in Ubuntu:
Fix Released
Status in linux source package in Bionic:
New
Status in linux-oem source package in Bionic:
Fix Released
Status in linux source package in Cosmic:
New
Status in linux-oem source package in Cosmic:
Fix Released
Bug description:
These two patches are already in the kernel-v5.0, so only B and C need
these two patches.
[Impact]
On a Dell machine, there is no other output devices but a headphone
on it, when plugging headset, the headset-mic can't work.
[Fix]
The headphone detection method is buggy, the driver can't detect
the headphone, then the driver will not initialize for headset-mic,
after applying these patches, the problem is fixed.
[Test Case]
Plug headset and record the sound from headset-mic, it works well.
[Regression Risk]
Low. the patch just change the headphone detection function, and the
function is already in the kernel from 5.0-rc, no bug is reported.
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