This bug was fixed in the package linux-oem-osp1 - 5.0.0-1043.48
---------------
linux-oem-osp1 (5.0.0-1043.48) bionic; urgency=medium
* bionic/linux-oem-osp1: 5.0.0-1043.48 -proposed tracker (LP:
#1867111)
* All PS/2 ports on PS/2 Serial add-in bracket are not working after S3
(LP: #1866734)
- SAUCE: Input: i8042 - Fix the selftest retry logic
* r8152 init may take up to 40 seconds at initialization with Dell WD19/WD19DC
during hotplug (LP: #1864284)
- UBUNTU SAUCE: r8151: check disconnect status after long sleep
* Miscellaneous Ubuntu changes
- [Config] Bump the GCC version
-- Timo Aaltonen <timo.aalto...@canonical.com> Thu, 12 Mar 2020
11:14:40 +0200
** Changed in: linux-oem-osp1 (Ubuntu)
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1862885
Title:
Sometimes can't adjust brightness on Dell AIO
Status in linux package in Ubuntu:
Fix Released
Status in linux-oem-osp1 package in Ubuntu:
Fix Released
Status in linux source package in Bionic:
Fix Released
Status in linux-oem-osp1 source package in Bionic:
Fix Released
Status in linux source package in Eoan:
Fix Released
Status in linux source package in Focal:
Fix Released
Bug description:
[Impact]
We already added retry on the backlight driver, but the scalar have to take
some time to activate panel during booting up, and 2 seconds seem doesn't
enough. So, it sometimes fails to get the response from scalar.
[Fix]
Enlarge the retry time from 2 seconds to 5 seconds.
We didn't observe the response time longer than 3 seconds, but to be more
confident, enlarge the value to 5 seconds.
[Test]
Verified on new Dell AIO platform.
[Regression Potential]
Low, increase the retry times doesn't hurt anything.
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