Anthony, what about the following panel (used on OLED Dell XPS 15): $ edid-decode /sys/class/drm/card0-eDP-1/edid EDID version: 1.4 Manufacturer: SDC Model a029 Serial Number 0 Made in week 10 of 2019 Digital display 10 bits per primary color channel DisplayPort interface Maximum image size: 34 cm x 19 cm Gamma: 2.20 Supported color formats: RGB 4:4:4 First detailed timing includes the native pixel format and preferred refresh rate Display x,y Chromaticity: Red: 0.6845, 0.3125 Green: 0.2431, 0.7070 Blue: 0.1386, 0.0546 White: 0.3125, 0.3291 Established timings supported: Standard timings supported: Detailed mode: Clock 573.410 MHz, 344 mm x 194 mm 3840 3888 3920 4400 hborder 0 2160 2164 2168 2172 vborder 0 +hsync -vsync VertFreq: 60 Hz, HorFreq: 130320 Hz Detailed mode: Clock 573.410 MHz, 344 mm x 194 mm 3840 3888 3920 4400 hborder 0 2160 2164 2168 2172 vborder 0 +hsync -vsync VertFreq: 60 Hz, HorFreq: 130320 Hz ASCII string: 0HHFM Manufacturer-specified data, tag 0 Has 1 extension blocks Checksum: 0xc0 (valid)
CTA extension block Extension version: 3 11 bytes of CTA data Extended tag: Colorimetry data block BT2020RGB Extended tag: HDR static metadata data block Electro optical transfer functions: Traditional gamma - SDR luminance range SMPTE ST2084 Supported static metadata descriptors: Static metadata type 1 Desired content max luminance: 115 (603.666 cd/m^2) Desired content max frame-average luminance: 109 (530.095 cd/m^2) Desired content min luminance: 208 (4.016 cd/m^2) 0 native detailed modes Checksum: 0xe2 (valid) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1831587 Title: brightness control not work with OLED panel To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1831587/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs