APPLIED[OSP1] Re: [SRU] [B/C/D/Unstable/OEM-B/OEM-OSP1-B] [PATCH 0/1] Fix disappearing Qualcomm WiFi/Bluetooth
tjaalton at ubuntu.com
Wed Jun 12 10:00:29 UTC 2019
On 10.6.2019 10.21, Kai-Heng Feng wrote:
> BugLink: https://bugs.launchpad.net/bugs/1757218
> Qualcomm WiFi/Bluetooth may disappear after boot.
> Disable USB2 LPM at shutdown phase, to prevent it from lingering in LPM
> L1. Pull back the device to full power before shutdown imitates the
> behavior on Windows.
> The affected user confimed it fixes the issue.
> I can also confirm that
> a) The power drain in S5 is much lower,
> b) Both WiFi and Bluetooth are always present during reboot stress test.
> [Regression Potential]
> Low. Only a limited number of USB2 devices that support LPM.
> Kai-Heng Feng (1):
> UBUNTU: SAUCE: USB: Disable USB2 LPM at shutdown
> drivers/usb/core/port.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
applied to osp1 oem-next, thanks
More information about the kernel-team