Public bug reported: [Impact] dell_laptop created a non-working backlight driver before nvidia is loaded, that leads to the system can't adjust the display brightness.
[Fix] The patch prevents platform driver(dell_laptop) from creating backlight driver after win8. https://patchwork.kernel.org/project/linux-acpi/patch/20230608091258.7963-1-hdego...@redhat.com/ [Test] Verified on the dell platform which reports this issue. [Where problems could occur] The assumption of the backlight control is that after win8 all laptops backlight are controlled by either ACPI or native graphic driver. It impact the laptops that do not follow the assumption and will lead to broken backlight interface. ** Affects: hwe-next Importance: Undecided Status: New ** Affects: linux (Ubuntu) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.0 (Ubuntu) Importance: Undecided Status: Invalid ** Affects: linux-oem-6.1 (Ubuntu) Importance: Undecided Status: Invalid ** Affects: linux (Ubuntu Jammy) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.0 (Ubuntu Jammy) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.1 (Ubuntu Jammy) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux (Ubuntu Kinetic) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.0 (Ubuntu Kinetic) Importance: Undecided Status: Invalid ** Affects: linux-oem-6.1 (Ubuntu Kinetic) Importance: Undecided Status: Invalid ** Affects: linux (Ubuntu Lunar) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.0 (Ubuntu Lunar) Importance: Undecided Status: Invalid ** Affects: linux-oem-6.1 (Ubuntu Lunar) Importance: Undecided Status: Invalid ** Affects: linux (Ubuntu Mantic) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.0 (Ubuntu Mantic) Importance: Undecided Status: Invalid ** Affects: linux-oem-6.1 (Ubuntu Mantic) Importance: Undecided Status: Invalid ** Tags: civet-cat oem-priority originate-from-2012887 ** Also affects: linux-oem-6.0 (Ubuntu) Importance: Undecided Status: New ** Also affects: linux-oem-6.1 (Ubuntu) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Lunar) Importance: Undecided Status: New ** Also affects: linux-oem-6.0 (Ubuntu Lunar) Importance: Undecided Status: New ** Also affects: linux-oem-6.1 (Ubuntu Lunar) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Jammy) Importance: Undecided Status: New ** Also affects: linux-oem-6.0 (Ubuntu Jammy) Importance: Undecided Status: New ** Also affects: linux-oem-6.1 (Ubuntu Jammy) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Kinetic) Importance: Undecided Status: New ** Also affects: linux-oem-6.0 (Ubuntu Kinetic) Importance: Undecided Status: New ** Also affects: linux-oem-6.1 (Ubuntu Kinetic) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Mantic) Importance: Undecided Status: New ** Also affects: linux-oem-6.0 (Ubuntu Mantic) Importance: Undecided Status: New ** Also affects: linux-oem-6.1 (Ubuntu Mantic) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Jammy) Status: New => In Progress ** Changed in: linux (Ubuntu Jammy) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux (Ubuntu Kinetic) Status: New => In Progress ** Changed in: linux (Ubuntu Kinetic) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux (Ubuntu Lunar) Status: New => In Progress ** Changed in: linux (Ubuntu Lunar) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux (Ubuntu Mantic) Status: New => In Progress ** Changed in: linux (Ubuntu Mantic) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux-oem-6.0 (Ubuntu Jammy) Status: New => In Progress ** Changed in: linux-oem-6.0 (Ubuntu Jammy) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux-oem-6.1 (Ubuntu Jammy) Status: New => In Progress ** Changed in: linux-oem-6.1 (Ubuntu Jammy) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux-oem-6.0 (Ubuntu Kinetic) Status: New => Invalid ** Changed in: linux-oem-6.0 (Ubuntu Lunar) Status: New => Invalid ** Changed in: linux-oem-6.0 (Ubuntu Mantic) Status: New => Invalid ** Changed in: linux-oem-6.1 (Ubuntu Kinetic) Status: New => Invalid ** Changed in: linux-oem-6.1 (Ubuntu Lunar) Status: New => Invalid ** Changed in: linux-oem-6.1 (Ubuntu Mantic) Status: New => Invalid ** Tags added: civet-cat oem-priority originate-from-2012887 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2023638 Title: Stop trying to use vendor backlight control on laptops Status in HWE Next: New Status in linux package in Ubuntu: In Progress Status in linux-oem-6.0 package in Ubuntu: Invalid Status in linux-oem-6.1 package in Ubuntu: Invalid Status in linux source package in Jammy: In Progress Status in linux-oem-6.0 source package in Jammy: In Progress Status in linux-oem-6.1 source package in Jammy: In Progress Status in linux source package in Kinetic: In Progress Status in linux-oem-6.0 source package in Kinetic: Invalid Status in linux-oem-6.1 source package in Kinetic: Invalid Status in linux source package in Lunar: In Progress Status in linux-oem-6.0 source package in Lunar: Invalid Status in linux-oem-6.1 source package in Lunar: Invalid Status in linux source package in Mantic: In Progress Status in linux-oem-6.0 source package in Mantic: Invalid Status in linux-oem-6.1 source package in Mantic: Invalid Bug description: [Impact] dell_laptop created a non-working backlight driver before nvidia is loaded, that leads to the system can't adjust the display brightness. [Fix] The patch prevents platform driver(dell_laptop) from creating backlight driver after win8. https://patchwork.kernel.org/project/linux-acpi/patch/20230608091258.7963-1-hdego...@redhat.com/ [Test] Verified on the dell platform which reports this issue. [Where problems could occur] The assumption of the backlight control is that after win8 all laptops backlight are controlled by either ACPI or native graphic driver. It impact the laptops that do not follow the assumption and will lead to broken backlight interface. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/2023638/+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
