Please make CONFIG_PWM_LPSS_PCI and CONFIG_PWM_LPSS_PLATFORM built in to make brightness adjustment working on various BayTrail/CherryTrail-based devices

Bug #1783964 reported by RussianNeuroMancer on 2018-07-27
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Status tracked in Cosmic
Cosmic
Medium
Unassigned

Bug Description

Hello!

Building kernel with following option should make brightness adjustment working on various Intel BayTrail and CherryTrail-based devices such as HP Stream 7 Tablet, Microsoft Surface 3, and quite a few tablets from ASUS, and many no-name Chinese companies.

CONFIG_PWM_LPSS=y
CONFIG_PWM_LPSS_PCI=y
CONFIG_PWM_LPSS_PLATFORM=y

I tested this change on HP Stream 7, by installing Linux 4.18rc6 from http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.18-rc6/ and then installing same kernel, but with built in CONFIG_PWM_LPSS modules listed above.

summary: Please make CONFIG_PWM_LPSS_PCI and CONFIG_PWM_LPSS_PLATFORM built in to
- make brightness adjustment working on various BayTrail-based devices
+ make brightness adjustment working on various BayTrail/CherryTrail-based
+ devices
description: updated

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1783964

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

Changed in linux (Ubuntu):
status: New → Incomplete
Changed in linux (Ubuntu):
importance: Undecided → Medium
status: Incomplete → Triaged
tags: added: cosmic kernel-da-key

Upstream bugreport with more details: https://bugs.freedesktop.org/show_bug.cgi?id=96571

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