APPLIED[Unstable] / Cmt: [SRU] [B/C/D/Unstable] [PATCH 0/2] Fix and issue that LG I2C touchscreen stops working after reboot

Seth Forshee seth.forshee at
Tue Nov 27 16:36:05 UTC 2018

On Tue, Nov 27, 2018 at 06:59:06AM +0000, Kai-Heng Feng wrote:
> BugLink:
> [Impact]
> LG I2C touchscreen stops working after reboot.
> [Fix]
> Disable runtime PM for the touchscreen, which doesn't work well with
> consecutive ON/SLEEP commands.
> [Test]
> The touchscreen works well after reboot, when runtime PM is disabled.
> [Regression Potential]
> None. This is a new device and the fix is limited to this particular
> device.

The patch did not apply to unstable, so I cherry picked the fix

Wrt bionic though, there's the extra prerequisite patch that looks to be
affecting a different touchscreen. If so you can't really say that the
regression potential is limited to a single device. You should either
explain why we should also change runtime PM for that device and
describe what regression testing was done, or else omit the changes for
that device.


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