** Changed in: linux (Ubuntu Bionic)
Status: Incomplete => Fix Committed
** Changed in: linux (Ubuntu Eoan)
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/1863880
Title:
Another Dell AIO backlight issue
Status in linux package in Ubuntu:
Incomplete
Status in linux-oem-osp1 package in Ubuntu:
Invalid
Status in linux source package in Bionic:
Fix Committed
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:
Incomplete
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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