Public bug reported:
SRU Justification
[Impact]
When EDATEC Pi CM5 devices with 7-inch screens resume from screen off, a white
glow
appears around the screen for around 5 seconds before disappearing. EDATEC
determined
this to be caused by a backlight power state restoration bug.
[Fix]
Pull the fix from upstream Raspberry Pi tree (rpi-7.0.y branch):
- 25a3352a71be3 regulator: edatec-panel-regulator: Fix backlight power state
restoration
[Test Plan]
* Compile tested
* Boot tested
* No impacts to existing features found
Install the built packages and the correct config.txt, reboot the machine and
the 7"
display should no longer display a white glow when the screen lights up.
[Regression potential]
Relatively low, as change is a bug fix from upstream.
** Affects: linux-raspi (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2158944
Title:
Raspberry Pi CM5: EDATEC 7" display shows white ring around screen
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