![]() ![]() This should be a completely normal use case, and the call should simply do nothing if the gamma tables are already at their default values.īut for unknown reasons, this API call will sometimes set all RGB Gamma tables to 0 and all colors will show up as black. The bug is usually triggered when Lunar tries to reset the gamma tables to their default values by calling the CGDisplayRestoreColorSyncSettings() system method. This usually happens when custom color profiles are used, but it was reported on some default monitor profiles as well. If that doesn't fix the issue, you can try to disable the usage of Gamma completely from Advanced Settings Minimise future Gamma resets by disabling the HDR compatibility workaround from HDR Settings.Use a default color profile in System Preferences -> Displays.There's no complete fix for this as it is a macOS bug, but you can lower the chances of it appearing using the following steps: Unplug the monitor from the power socketīecause of a macOS bug in the Gamma API, your screen can go black then get back to normal after a few seconds.If you have any questions about the directions, just let us know. When you add it temporarily, it adds it only for that current boot cycle, so if, for any reason, it seems to cause issues or it does not work, all you need to do is reboot to clear it. You can use the following information How to add a kernel parameter to temporarily or permanently add the parameter. There are some other kernel parameters related to brightness we can try if that does not work. These kernel parameter works at the ACPI (firmware) level (a lower level than the applet would).Ī person with an iMac 12,2 (which still had both AMD and Intel working) was able to control brightness with acpi_backlight=vendor so let's see if that helps. Trying a similar approach in Mint (installing a brightness control) worked but the brightness setting was overridden almost immediately and returned to the default.Let's see if a kernel parameter works. V: 5.0.17 running in: gnome-terminal inxi: wrote: ⤴ Sun 3:29 amI don't know if this is relevant but when running Mac OS 10.13 on this machine the brightness keys didn't work, after disabling the AMD Radeon but I was able to install a utility/applet that gave me a brightness slider in the menu bar. Init: systemd v: 245 runlevel: 5 Compilers: gcc: 9.4.0 alt: 9 Shell: bash No active apt repos in: /etc/apt/sources.listĪctive apt repos in: /etc/apt//official-package-repositories.listġ: deb una main upstream import backportĢ: deb focal main restricted universe multiverseģ: deb focal-updates main restricted universe multiverseĤ: deb focal-backports main restricted universe multiverseĥ: deb focal-security main restricted universe multiverseĪctive apt repos in: /etc/apt//signal-xenial.listġ: deb xenial mainĪctive apt repos in: /etc/apt//vivaldi.list ![]() System Temperatures: cpu: 58.0 C mobo: N/A ID-1: /dev/sda model: SATA SSD size: 894.25 GiB speed: 6.0 Gb/s Vendor: Apple AirPort Extreme driver: wl v: kernel port: efa0 V: 3.3 Mesa 21.2.6 compat-v: 3.0 direct render: Yesĭevice-1: Intel 6 Series/C200 Series Family High Definition Audioĭriver: snd_hda_intel v: kernel bus ID: 00:1b.0 chip ID: 8086:1c20ĭevice-1: Broadcom and subsidiaries NetXtreme BCM57765 Gigabit Ethernetĭriver: tg3 v: 3.137 port: efa0 bus ID: 02:00.0 chip ID: 14e4:16b4ĭevice-2: Broadcom and subsidiaries BCM4331 802.11a/b/g/n OpenGL: renderer: Mesa DRI Intel HD Graphics 3000 (SNB GT2) Unloaded: fbdev,vesa resolution: 1680x1050~60Hz Vendor: Apple driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:0116ĭisplay: x11 server: X.Org 1.20.13 driver: modesetting Topology: Quad Core model: Intel Core i7-2675QM bits: 64 type: MT MCPĪrch: Sandy Bridge rev: 7 L2 cache: 6144 KiBįlags: avx lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 35120 Model: SMP bq20z451 type: Li-ion serial: N/A status: Charging cycles: 1869 Type: Laptop System: Apple product: MacBookPro8,2 v: 1.0 serial: Ĭhassis: type: 10 v: Mac-94245A3940C91C80 serial:
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