SRU: https://lists.ubuntu.com/archives/kernel-
team/2022-April/129095.html (oem-5.14, oem-5.17, jammy, unstable)
** Description changed:
+ [SRU Justification]
+
+ [Impact]
+
+ WCN6856 BT keep in OFF state after coldboot system.
+
+ [Fix]
+
+ Mainline commit 599ece4f8f07 ("Bluetooth: btusb: Improve stability for
+ QCA devices") added a 100ms delay for the underlying hw to apply
+ downloaded firmware.
+
+ [Test Case]
+
+ This can be reproduced and therefore verified by checkbox poweroff
+ stress test:
+
+ $ checkbox-cli run com.canonical.certification::stress/poweroff
+
+ [Where problems could occur]
+
+ Unlikely to have side effect so far except slowing down boot process for
+ a tiny moment.
+
+ [Other Info]
+
+ While this is only in the v5.18 merge window, all the kernels in use are
+ affected and nominated here.
+
+ ========== original bug report ==========
+
[Reproduce Steps]
1.Insert WCN6856 card to SUT.
2.Press power button to power on SUT.
3.Clean install Ubuntu 20.04.
4.Check BT function after installation is complete.
5.Coldboot system and check the BT function.
6.Repeat step5, Issue occur.
7.Only found with CB, can't reproduce on WB.
[Results]
- Expected Result
- BT function work normally.
- Actual Result
- BT has no function. Can't turn ON BT function. Need CB to recover BT
function.
- "WB" and "swicth tab" cannot restore the BT function.
+ Expected Result
+ BT function work normally.
+ Actual Result
+ BT has no function. Can't turn ON BT function. Need CB to recover BT
function.
+ "WB" and "swicth tab" cannot restore the BT function.
[Others]
Wifi function work normally.
** Changed in: linux-oem-5.17 (Ubuntu Jammy)
Importance: Undecided => High
** Changed in: linux-oem-5.17 (Ubuntu Jammy)
Status: New => In Progress
** Changed in: linux-oem-5.17 (Ubuntu Jammy)
Assignee: (unassigned) => You-Sheng Yang (vicamo)
** Changed in: linux-oem-5.14 (Ubuntu Focal)
Importance: Undecided => High
** Changed in: linux-oem-5.14 (Ubuntu Focal)
Status: Triaged => In Progress
** Changed in: linux-oem-5.14 (Ubuntu Focal)
Assignee: (unassigned) => You-Sheng Yang (vicamo)
** Changed in: linux (Ubuntu Jammy)
Importance: Undecided => High
** Changed in: linux (Ubuntu Jammy)
Status: Incomplete => In Progress
** Changed in: linux (Ubuntu Jammy)
Assignee: (unassigned) => You-Sheng Yang (vicamo)
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem-5.14 in Ubuntu.
https://bugs.launchpad.net/bugs/1967067
Title:
WCN6856 BT keep in OFF state after coldboot system
Status in HWE Next:
New
Status in linux package in Ubuntu:
In Progress
Status in linux-oem-5.14 package in Ubuntu:
Invalid
Status in linux-oem-5.17 package in Ubuntu:
In Progress
Status in linux source package in Focal:
Invalid
Status in linux-oem-5.14 source package in Focal:
In Progress
Status in linux-oem-5.17 source package in Focal:
Invalid
Status in linux source package in Jammy:
In Progress
Status in linux-oem-5.14 source package in Jammy:
Invalid
Status in linux-oem-5.17 source package in Jammy:
In Progress
Bug description:
[SRU Justification]
[Impact]
WCN6856 BT keep in OFF state after coldboot system.
[Fix]
Mainline commit 599ece4f8f07 ("Bluetooth: btusb: Improve stability for
QCA devices") added a 100ms delay for the underlying hw to apply
downloaded firmware.
[Test Case]
This can be reproduced and therefore verified by checkbox poweroff
stress test:
$ checkbox-cli run com.canonical.certification::stress/poweroff
[Where problems could occur]
Unlikely to have side effect so far except slowing down boot process for
a tiny moment.
[Other Info]
While this is only in the v5.18 merge window, all the kernels in use are
affected and nominated here.
========== original bug report ==========
[Reproduce Steps]
1.Insert WCN6856 card to SUT.
2.Press power button to power on SUT.
3.Clean install Ubuntu 20.04.
4.Check BT function after installation is complete.
5.Coldboot system and check the BT function.
6.Repeat step5, Issue occur.
7.Only found with CB, can't reproduce on WB.
[Results]
Expected Result
BT function work normally.
Actual Result
BT has no function. Can't turn ON BT function. Need CB to recover BT
function.
"WB" and "swicth tab" cannot restore the BT function.
[Others]
Wifi function work normally.
To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/1967067/+subscriptions
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