please verify oem-6.1 1022 ** Tags added: verification-needed-jammy-linux-oem-6.1
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-6.1 in Ubuntu. https://bugs.launchpad.net/bugs/2032704 Title: Fix panel brightness issues on HP laptops Status in HWE Next: New Status in linux package in Ubuntu: Confirmed 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: Won't Fix Status in linux-oem-6.1 source package in Jammy: Fix Committed Status in linux-oem-6.5 source package in Jammy: Fix Released Status in linux source package in Lunar: Fix Committed 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: Confirmed 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] Brightness can't be changed or can only be changed once on some modern HP laptops. [Fix] BIOS folks identified the issue where the ACPI _PS0 method isn't called for the panel device. On Windows the method is being invoked. This is due to missing _PSC, but since Windows is the de facto spec, we have to perform the same to make the device functional. [Test] Once the fix is applied, the brightness can be changed smoothly. [Where problems could occur] According to BIOS folks, Windows also invokes _PS3 for sleep and shutdown, we need to tackle that in the future. Right now not calling _PS3 has no ill-effect, per BIOS folks. X-HWE-Bug: Bug #2032704 To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/2032704/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
