Verified,
~~~
$ uname -a
Linux u-Precision-5480 6.0.0-1019-oem #19-Ubuntu SMP PREEMPT_DYNAMIC Tue Jun 20
10:50:57 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
$ ubuntu-report show | grep -ie bios -a5
"BIOS": {
"Version": "1.3.0"
},
~~~
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem-6.0 in Ubuntu.
https://bugs.launchpad.net/bugs/2021949
Title:
Fix Monitor lost after replug WD19TBS to SUT port with VGA/DVI to
type-C dongle
Status in HWE Next:
New
Status in OEM Priority Project:
New
Status in linux package in Ubuntu:
Fix Committed
Status in linux-oem-6.0 package in Ubuntu:
Invalid
Status in linux-oem-6.1 package in Ubuntu:
Invalid
Status in linux source package in Jammy:
New
Status in linux-oem-6.0 source package in Jammy:
Fix Committed
Status in linux-oem-6.1 source package in Jammy:
Fix Released
Status in linux source package in Kinetic:
Fix Committed
Status in linux-oem-6.0 source package in Kinetic:
Invalid
Status in linux-oem-6.1 source package in Kinetic:
Invalid
Status in linux source package in Lunar:
Fix Committed
Status in linux-oem-6.0 source package in Lunar:
Invalid
Status in linux-oem-6.1 source package in Lunar:
Invalid
Status in linux source package in Mantic:
Fix Committed
Status in linux-oem-6.0 source package in Mantic:
Invalid
Status in linux-oem-6.1 source package in Mantic:
Invalid
Bug description:
[Impact]
Enabling CL1 (Controller Low Power) states during discovery of existing
tunnels established by the system firmware can interfere with the operation of
those tunnels.
The DisplayPort tunnel establishment timeout of 1.5 seconds can be
insufficient for some docking stations, leading to blank displays.
[Fix]
CL1 states are now not enabled during discovery of existing tunnels. The TMU
settings also remain unchanged.
The timeout is increased to 3 seconds to allow more time for the DisplayPort
connection manager handshake, fixing the issue of displays remaining blank.
[Test Cases]
1. plug docking station on the host
2. bring up the host and get into desktop.
3. flip docking station's cable.
4. check if the external monitor works well
[Where problems could occur]
Low, If the handshake actually requires even more than 3 seconds in some
cases, the timeout may still need to be increased further.
[Misc]
Jammy needs more patches to enable the thunderbolt CLx and the SRU will be a
huge,
so skip Jammy.
To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/2021949/+subscriptions
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