** Description changed: [Impact] The dell-uart-backlight driver has been loaded, but the backlight is controller by graphics driver instead of scalar IC. The old way to determinate weather the driver should be loaded is not working anymore, since the behavior of scalar command, show firmware version, is not the same as old platforms. [Fix] Using more a reliable command, get_scalar_status, to check if scalar is in charge of the AIO backlight. [Test] Verified on new Dell AIO platforms. [Regression Potential] - Expected. The get_scalar_status command is not supported by the first generation AIO platforms, so the driver may not be loaded on old AIO machines due to get_scalar_status command returns 0. To ease the pain, the "force" parameter has been introduced to make the driver can be loaded regardless of the return value of get_scalar_status command. + Low. The quirk lists all old platforms which use the old way to check if scalar IC is in use. So, it won't change the behavior on old platforms, and apply the new method on new platforms.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1813877 Title: Can't adjust brightness on DELL UHD dGPU AIO To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1813877/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
