** Changed in: linux (Ubuntu Bionic)
Status: Incomplete => In Progress
** Changed in: linux (Ubuntu Disco)
Status: Incomplete => In Progress
** Changed in: linux (Ubuntu Eoan)
Status: Incomplete => In Progress
** Changed in: linux (Ubuntu Focal)
Status: Incomplete => In Progress
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https://bugs.launchpad.net/bugs/1858761
Title:
Dell AIO can't adjust brightness
Status in HWE Next:
New
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Bionic:
In Progress
Status in linux source package in Disco:
In Progress
Status in linux source package in Eoan:
In Progress
Status in linux source package in Focal:
In Progress
Bug description:
[Impact]
Found on new platforms that UART require more than 1 second to respond
commands in the first 10 seconds after booted.
And the first command we send to scalar is dell_uart_get_scalar_status()
to tell if scalar is in charge of the backlight, and it always fails to get
response because of timeout.
[Fix]
Adding retry and increasing read timeout for dell_uart_get_scalar_status()
[Test]
Verified on the target Dell AIO, it can now read the response from scalar.
[Regression Potential]
Low, adding retry and increasing read timeout doesn't change the code flow.
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