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 <[email protected]> Thu, 12 Mar 2020
11:14:40 +0200
** Changed in: linux-oem-osp1 (Ubuntu)
Status: Invalid => Fix Released
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https://bugs.launchpad.net/bugs/1863880
Title:
Another Dell AIO backlight issue
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:
Confirmed
Status in linux-oem-osp1 source package in Bionic:
Fix Released
Status in linux source package in Eoan:
Fix Committed
Status in linux source package in Focal:
Fix Released
Bug description:
[Impact]
The scalar which control the backlight sometimes doesn't respond the first
command, so driver can't determinate whether this scalar is in charge of the
backlight.
[Fix]
Move the retry block not only to read the response, but also includes write
command, so that it re-send the command, too.
[Test]
Verified on the buggy Dell AIO, it passes 30 times and should be more
reliable.
[Regression Potential]
Low, there is no code flow change, just move the retry block to include both
write and read command.
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