This bug was fixed in the package linux - 6.5.0-7.7
---------------
linux (6.5.0-7.7) mantic; urgency=medium
* mantic/linux: 6.5.0-7.7 -proposed tracker (LP: #2037611)
* kexec enable to load/kdump zstd compressed zimg (LP: #2037398)
- [Packaging] Revert arm64 image format to Image.gz
* Mantic minimized/minimal cloud images do not receive IP address during
provisioning (LP: #2036968)
- [Config] Enable virtio-net as built-in to avoid race
* Miscellaneous Ubuntu changes
- SAUCE: Add mdev_set_iommu_device() kABI
- [Config] update gcc version in annotations
-- Andrea Righi <andrea.ri...@canonical.com> Thu, 28 Sep 2023 10:19:24
+0200
** Changed in: linux (Ubuntu Mantic)
Status: In Progress => Fix Released
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Packages, which is subscribed to linux-oem-6.1 in Ubuntu.
https://bugs.launchpad.net/bugs/2008882
Title:
Make backlight module auto detect dell_uart_backlight
Status in HWE Next:
New
Status in linux package in Ubuntu:
Fix Released
Status in linux-oem-6.1 package in Ubuntu:
Invalid
Status in linux-oem-6.5 package in Ubuntu:
Invalid
Status in linux source package in Jammy:
Invalid
Status in linux-oem-6.1 source package in Jammy:
Fix Released
Status in linux-oem-6.5 source package in Jammy:
Fix Released
Status in linux source package in Lunar:
Won't Fix
Status in linux-oem-6.1 source package in Lunar:
Invalid
Status in linux-oem-6.5 source package in Lunar:
Invalid
Status in linux source package in Mantic:
Fix Released
Status in linux-oem-6.1 source package in Mantic:
Invalid
Status in linux-oem-6.5 source package in Mantic:
Invalid
Bug description:
[Impact]
There are acpi_video* sysfs backlight interface in the system which are not
working.
For Dell AIO platforms, we use dell_uart_backlight to control the display
brightness.
The old way to fix this is to unregister acpi backlight interfaces in the
backlight driver, but it may lead to some issues and the unregister function
has been removed since v6.1-rc1
77ab9d4d44cd ("ACPI: video: Remove acpi_video_set_dmi_backlight_type()")
[Fix]
The new way to do this is to collect all the quirk and auto detection method
in video_detect.c
I added an audo detection for the Dell AIO platoform to the driver which
should do the same thing as the old way.
[Test]
Verified on the Dell AIO platform and confirmed there is only on
dell_uart_backlight in the sysfs, and no acpi_video* interface.
[Where problems could occur]
There should be no regression potential, it uses different way to do the same
thing, should be pretty safe.
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