[SRU][OEM-B]UBUNTU: SAUCE: enable adjusting brightness on some samsung OLED panels

Bug #1844798 reported by AaronMa on 2019-09-20
20
This bug affects 4 people
Affects Status Importance Assigned to Milestone
OEM Priority Project
High
Unassigned
linux-oem (Ubuntu)
Undecided
Unassigned
Bionic
Undecided
Unassigned

Bug Description

SRU justification:

[Impact]
OLED backlight is not supported by the current kernel.
brightness can't be adjusted.

[Fix]
Fix max brightness value;
Follow samsung panel's spec to enable dpcd and
support adjusting brightness on OLED.

[Test]
Verified on several laptops, backlight on and brightness is adjusted.

[Regression Potential]
Medium, change is limited to specific hardware feature.
Verified on no dpcd support laptops, no regression found yet.

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 1844798

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):
status: Incomplete → Confirmed
AaronMa (mapengyu) on 2019-10-11
description: updated
summary: - [SRU][B/OEM-B/OEM-OSP1/D/E]UBUNTU: SAUCE: enable adjusting brightness on
- some samsung OLED panels
+ [SRU][OEM-B]UBUNTU: SAUCE: enable adjusting brightness on some samsung
+ OLED panels
Timo Aaltonen (tjaalton) on 2019-10-11
affects: linux (Ubuntu) → linux-oem (Ubuntu)
Changed in linux-oem (Ubuntu):
status: Confirmed → Fix Committed
Changed in linux-oem (Ubuntu Bionic):
status: New → Fix Committed
Changed in linux-oem (Ubuntu):
status: Fix Committed → New
status: New → Confirmed
Alex Tu (alextu) on 2019-10-12
Changed in oem-priority:
importance: Undecided → High
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package linux-oem - 4.15.0-1059.68

---------------
linux-oem (4.15.0-1059.68) bionic; urgency=medium

  * bionic/linux-oem: 4.15.0-1059.68 -proposed tracker (LP: #1847801)

  * Fix non-working Realtek USB ethernet after system resume (LP: #1847063)
    - r8152: remove extra action copying ethernet address
    - r8152: Refresh MAC address during USBDEVFS_RESET
    - r8152: Set macpassthru in reset_resume callback

  * [CML-U] Comet lake platform need ISH driver support (LP: #1843775)
    - HID: intel-ish-hid: Add Comet Lake PCI device ID

  * [SRU][OEM-B]UBUNTU: SAUCE: enable adjusting brightness on some samsung OLED
    panels (LP: #1844798)
    - SAUCE: i915: intel_dp_aux_backlight: Fix max backlight calculations
    - SAUCE: drm/i915: customize DPCD brightness control for specific panel

 -- Timo Aaltonen <email address hidden> Fri, 11 Oct 2019 20:54:45 +0300

Changed in linux-oem (Ubuntu Bionic):
status: Fix Committed → Fix Released
Changed in linux-oem (Ubuntu):
status: Confirmed → Fix Released
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