Comments (7)
rockowitz
commented on June 8, 2024
1
Ok guys, you've won me over (or worn me down). My current development
version implements relative setvcp values for Continuous VCP features.
The command line syntax is less than optimal. I'm not thrilled about
documenting it. Feedback and/or alternatives appreciated.
Examples:
setvcp 10 + 5
setvcp 10 - 5
Note the space after the + or -. This is necessary because ddcutil's
command line parser, implemented using glib's parser, recognizes "-5" as
unrecognized option "-5".
Sanford
…On 2/14/2018 8:40 PM, Wilson Biggs wrote:
I'd love this a lot too - it'd enable me to use keyboard shortcuts to
increase/decrease my monitor's brightness, which would be really nice
to be able to do.
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rockowitz
commented on June 8, 2024
Thank you for the suggestion. You're not the first to request such
feature; your suggestion gives the feature request more weight. The
behavior would apply only to continuous VCP features, which makes the
implementation not quite as simple as it might otherwise seem. I do
wonder about the syntax. Documenting that "10 is an absolute value, but
+10 a relative one, seems a bit arcane.
Sanford
…On 08/03/2017 09:07 AM, Lord wrote:
I have a quite simple usage of ddcutil. I use it only to change the
brightness of my monitor.
Being able to increment/decrement brightness could be quite handy :
Something like "ddcutil setvcp 10 +10" would read the current value
and add 10 to that value.
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rockowitz
commented on June 8, 2024
Should have added to my reply that comments from others on the
desirability of this feature and its syntax would be most welcome.
Sanford
…On 08/03/2017 09:07 AM, Lord wrote:
I have a quite simple usage of ddcutil. I use it only to change the
brightness of my monitor.
Being able to increment/decrement brightness could be quite handy :
Something like "ddcutil setvcp 10 +10" would read the current value
and add 10 to that value.
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diggit
commented on June 8, 2024
Some discussion was here #23. I abandoned that feature request, because write operation takes on my HW about 360ms and reading out value to modify would make it double.
Volume control on my monitor does not have linear step so i switched to solution without feedback from monitor itself.
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w-biggs
commented on June 8, 2024
I'd love this a lot too - it'd enable me to use keyboard shortcuts to increase/decrease my monitor's brightness, which would be really nice to be able to do.
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rockowitz
commented on June 8, 2024
Wilson,
Thanks for the input, with a use case.
I remain hesitant about the ambiguity of "setvcp 30" specifying an
absolute value, but "setvcp +30" specifying a relative value. But I'll
continue to ponder it. It may be that specifying "+30" is so strange
that the only people who would do it would know that it indicates a
relative value.
Sanford
…On 02/14/2018 11:40 PM, Wilson Biggs wrote:
I'd love this a lot too - it'd enable me to use keyboard shortcuts to
increase/decrease my monitor's brightness, which would be really nice
to be able to do.
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rockowitz
commented on June 8, 2024
Release 0.9.0 implements relative values on setvcp, but only for standard continuous features, i.e. not those with a reserved subrange of NC values. See the release announcement at www.ddcutil.com. Note the need to surround "+" or "-" with blanks, to indicate a relative rather than absolute value. I'm not mad-keen on the syntax, but it's the best I could come with.
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Related Issues (20)
- stack overflow in query_proc_modules_for_video leading to segfault HOT 5
- With "--enable-usb=no", compile error: ‘ignored_vid_pid’ undeclared HOT 1
- The brightness is always set to 0 when executing `setvcp` on Rpi5 Bookworm HOT 1
- Samsung U32J59x only works on DisplayPort HOT 6
- ddcutil 2.0 regression. (Invalid Display. DDC communication failed. causes: EIO / ETIMEDOUT). works in 1.4.1-1 HOT 13
- current development branch is now 2.1.0-dev
- Release 2.1.0 HOT 5
- --async deprecated but documented config options don't exist HOT 2
- powerdevil kde restarting endlessly HOT 12
- KDE power management system keeps crashing after updating ddcutilt to 2.1.0 HOT 1
- FPS drops on get/set - Nvidia non-free - Wayland HOT 4
- 2.1.0: "--disable-usb" --> error: 'DEFAULT_ENABLE_USB' undeclared HOT 2
- Crash and restart loop in org_kde_powerdevil on ArchLinux KDE Plasma 5 HOT 2
- Crash due to invalid assertion HOT 6
- Fixed PowerDevil crash with release 2.1.0
- Documentation links to old tarball HOT 1
- Documentation for building from source doesn't work HOT 1
- ASUS PA278CV monitor shown as invalid monitor HOT 3
- Udev Rule Crashes with Cherry Keyboard HOT 1
- Release 2.1.2
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