5 ms·

I wish there was a way just to actually manage the display settings from a computer. Brightness, contrast, ... 2019 and one still has use the display's buttons

I wish there was a way just to actually manage the display settings from a computer. Brightness, contrast, ... 2019 and one still has use the display's buttons to control settings, unless it is a laptop's fixed display.

iforgotpassword 7y ago
there's ddc, which has existed for a long time. It even worked back in VGA days. I automated some stuff with bash scripts and ddcutil on Linux. Edit: DDC/CI to be precise, introduced in 1998: https://en.wikipedia.org/wiki/Display_Data_Channel#DDC/CI https://en.wikipedia.org/wiki/Display_Data_Channel#DDC/CI
- garaetjjte 7y ago
  It can be also exposed as kernel backlight device, then standard laptop GNOME/KDE brightness widgets just work.
  - Reelin 7y ago
    How does one do this? On my desktop I currently use the ddccontrol and gddccontrol packages, but it would be awesome if the backlight slider existed the same as on my laptop.
    - garaetjjte 7y ago
      There is simple driver: https://lore.kernel.org/patchwork/patch/753233/ https://lore.kernel.org/patchwork/patch/753233/ As noted in discussion, Luminance VCD while worked for my monitors, backlight level 0x6B or legacy 0x13 would be better choice. It then can be used by instantiating it at proper I²C monitor bus, e.g.: insmod ddcci_bl.ko modprobe i2c-dev echo ddcci_bl 0x37 > /sys/bus/i2c/devices/i2c-2/new_device (oh, and it now over 2 years and I still haven't got time to integrate it with DRM display hotplug so it could be upstreamed :(
JaimeThompson 7y ago
Under Windows this is what I use https://clickmonitorddc.bplaced.net https://clickmonitorddc.bplaced.net to change such things.
- _Microft 7y ago
  This is great, thanks for sharing!
  - JaimeThompson 7y ago
    You are welcome. I just yesterday found about about this which updates most nVidia cards so that when the monitor in a multiple display setup are turned off all the windows on that screen do not get moved to the main screen. https://www.nvidia.com/object/nv-uefi-update-x64.html https://www.nvidia.com/object/nv-uefi-update-x64.html
- kiddico 7y ago
  Holy crap! This has been one of those things I've been wanting for so long! Thanks!
- nomercy400 7y ago
  Thank you! This works great! Another app for my list of portable tools.
poyu 7y ago
There's ddcutil for linux and this app for macOS https://github.com/the0neyouseek/MonitorControl https://github.com/the0neyouseek/MonitorControl
ken 7y ago
My early-2000's Apple DVI displays support software brightness controls. Is that some proprietary feature that still hasn't been added to the general protocols?
prashnts 7y ago
On Mac, I wrote a config [1] which uses `ddcctl` [2] cli tool to sync both brightness and volume using keyboard buttons. It worked quite well, although I haven’t used it for a while. I guess similar idea could be extended for linux too. [1] https://github.com/prashnts/dotfiles/blob/master/etc/hammerspoon/ddcci.lua https://github.com/prashnts/dotfiles/blob/master/etc/hammers... [2] https://github.com/kfix/ddcctl/blob/master/README.md https://github.com/kfix/ddcctl/blob/master/README.md Edit: Just noticed further down in the comments that an app exists for it now!

iforgotpassword 7y ago

there's ddc, which has existed for a long time. It even worked back in VGA days. I automated some stuff with bash scripts and ddcutil on Linux. Edit: DDC/CI to be precise, introduced in 1998: https://en.wikipedia.org/wiki/Display_Data_Channel#DDC/CI https://en.wikipedia.org/wiki/Display_Data_Channel#DDC/CI

garaetjjte 7y ago
It can be also exposed as kernel backlight device, then standard laptop GNOME/KDE brightness widgets just work.
- Reelin 7y ago
  How does one do this? On my desktop I currently use the ddccontrol and gddccontrol packages, but it would be awesome if the backlight slider existed the same as on my laptop.
  - garaetjjte 7y ago
    There is simple driver: https://lore.kernel.org/patchwork/patch/753233/ https://lore.kernel.org/patchwork/patch/753233/ As noted in discussion, Luminance VCD while worked for my monitors, backlight level 0x6B or legacy 0x13 would be better choice. It then can be used by instantiating it at proper I²C monitor bus, e.g.: insmod ddcci_bl.ko modprobe i2c-dev echo ddcci_bl 0x37 > /sys/bus/i2c/devices/i2c-2/new_device (oh, and it now over 2 years and I still haven't got time to integrate it with DRM display hotplug so it could be upstreamed :(

JaimeThompson 7y ago

Under Windows this is what I use https://clickmonitorddc.bplaced.net https://clickmonitorddc.bplaced.net to change such things.

_Microft 7y ago
This is great, thanks for sharing!
- JaimeThompson 7y ago
  You are welcome. I just yesterday found about about this which updates most nVidia cards so that when the monitor in a multiple display setup are turned off all the windows on that screen do not get moved to the main screen. https://www.nvidia.com/object/nv-uefi-update-x64.html https://www.nvidia.com/object/nv-uefi-update-x64.html
kiddico 7y ago
Holy crap! This has been one of those things I've been wanting for so long! Thanks!
nomercy400 7y ago
Thank you! This works great! Another app for my list of portable tools.

poyu 7y ago

There's ddcutil for linux and this app for macOS https://github.com/the0neyouseek/MonitorControl https://github.com/the0neyouseek/MonitorControl

ken 7y ago

My early-2000's Apple DVI displays support software brightness controls. Is that some proprietary feature that still hasn't been added to the general protocols?

prashnts 7y ago

On Mac, I wrote a config [1] which uses `ddcctl` [2] cli tool to sync both brightness and volume using keyboard buttons. It worked quite well, although I haven’t used it for a while. I guess similar idea could be extended for linux too. [1] https://github.com/prashnts/dotfiles/blob/master/etc/hammerspoon/ddcci.lua https://github.com/prashnts/dotfiles/blob/master/etc/hammers... [2] https://github.com/kfix/ddcctl/blob/master/README.md https://github.com/kfix/ddcctl/blob/master/README.md Edit: Just noticed further down in the comments that an app exists for it now!