** Description changed: - Brightness control is not working in GNOME and login manager (GDM). Also - there is not any UI control to control brightness (or they are not - showing to me), and keyboard buttons also does not work. The only way to - set brightness is using xbacklight with elevated rights (sudo or as - root). + Brightness control is not working in GNOME, under any login manager + (GDM, Lightdm, SDDM) and under kernel boot up. - Was not needed to set kernel parameters "acpi_osi=" neither - "acpi_backlight=". I tested with each one of the kernel parameters and - both at the same time to see if could work, but nothing changed. + Under GNOME there is not any UI control to control brightness (or they + are not showing to me), and keyboard buttons also does not work. The + only way to set brightness in GNOME is by using xbacklight, which by + default requires elevated rights (sudo or as root). - However, I installed KDE desktop to test if there brightness also cannot - be easily set, and UI controls and hardware buttons worked as expected - without needing to sudo it, unlike GNOME. However, brightness control - under login manager SDDM (installed with KDE) also does not work. + I have installed MATE and KDE desktop environments, and although + brightness does not work in Linux kernel tty, in MATE and KDE brightness + buttons work out of the box as expected. Also brightness settings + persists within each DE on its own, unlike GNOME's case (which + brightness has to be set manually with xbacklight). - Brightness persists only within KDE, but not to booting screen. Setting - brightness with xbacklight does not work under a non-GUI tty, but if I - set it first within a GUI tty, then the non graphical tty keeps the - brightness, but this setting does not persist across reboots. + Even though brightness under booting process does not work, that is not + a big issue since it works under Xorg (at least) once DE is loaded (MATE + and KDE handle it properly), screen dim is set to user configuration + value. But GNOME is not working as it should work for a default and + flagship DE. Of course, would be great if session manager and kernel + could set and save brightness level too. - I do not know if it is a bug of Xorg, GNOME, or just related to drivers, - but would be good to have functional brightness control out of the box - without having to sudo xbacklight. - I have installed Ubuntu 18.04 beta 2 and also installed the subsequent - updates, so my system is up to date. + + I have installed Ubuntu 18.04 and also installed the subsequent updates, + so my system is up to date. My computer is a laptop HP Omen 15-ce0xx: * CPU: Intel® Core™ i7-7700HQ CPU @ 2.80GHz × 8 * GPU: Nvidia GeForce GTX 1060 with Max-Q Design * Storage: SSD NVME Samsung HDD SATA * Chipset Intel System is Ubuntu 18.04 64 bits Kernel version 4.15.0-20-generic - Using NVIDIA proprietary drivers because with Nouveau drivers I had problems when resuming after suspend. If I recall correctly, this issue also happened with Nouveau. - + Using NVIDIA proprietary drivers. Please tell me if you need more information. - - - ---- - PS: I do not know if it is related, but I have read in a NVIDIA driver 387.22 (latest available in Ubuntu 18.04 and installed in my laptop is 390.48) release notes (http://www.nvidia.com/download/driverResults.aspx/126185/en-us) this: - - > Added an nvidia.ko kernel module parameter, NVreg_EnableBacklightHandler, which can be used to - > enable experimental handling of laptop backlight brightness through /sys/class/backlight/. This - > handler overrides the ACPI-based one provided by the video.ko kernel module. - > - > NVreg_EnableBacklightHandler is disabled by default. - - Could this be somehow related? + [EDITED 2018-05-18: cleanup and update]
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1767001 Title: Brightness control not working in GNOME - Ubuntu 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1767001/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
