| Summary: | Monitor brightness is incorrect after wakeup | ||
|---|---|---|---|
| Product: | [Plasma] plasmashell | Reporter: | nectarien |
| Component: | Brightness and Color widget | Assignee: | Plasma Bugs List <plasma-bugs-null> |
| Status: | RESOLVED DUPLICATE | ||
| Severity: | normal | CC: | kde, kdedev, natalie_clarius, xaver.hugl |
| Priority: | NOR | ||
| Version First Reported In: | 6.4.4 | ||
| Target Milestone: | 1.0 | ||
| Platform: | Neon | ||
| OS: | Linux | ||
| See Also: |
https://bugs.kde.org/show_bug.cgi?id=492481 https://bugs.kde.org/show_bug.cgi?id=508982 |
||
| Latest Commit: | Version Fixed In: | ||
| Sentry Crash Report: | |||
| Attachments: |
Screenshot of the menu in question
Power management settings |
||
Thanks for the bug report. Can I ask you for some information that will help us figure out what's happening? 1. The version of ddcutil on your system 2. Please run kscreen-doctor -o and paste the output into the report. Thanks. Created attachment 184300 [details]
Power management settings
Thanks for getting back to me. Please find the requested information below.
It turns out that my original description was not entirely correct, sorry:
CORRECTION TO MY REPORT:
- The incorrect brightness does not result from suspend/wakeup but rather from reactivating the system (keyboard press) after the monitor had been dimmed / deactivated due to the power management.
- In other words: actively choosing 'suspend' from the start menu and reactivating results in the correct brightness. Letting the monitor turn off, without suspend, and reactivating results in the incorrect brightness.
- Perhaps the automatic monitor dimming is not being corrected?
See attachment for my power management settings.
kscreen-doctor -o
Output: 1 DP-1 ddcafff0-ef1f-4925-ad45-4894cf5ae087
enabled
connected
priority 1
DisplayPort
replication source:0
Modes: 1:3840x2160@60*! 2:3840x2160@30 3:3840x2160@30 4:3840x2160@30 5:1920x1200@60 6:1920x1080@60 7:1920x1080@60 8:1920x1080@60 9:1920x1080@60 10:1920x1080@60 11:1920x1080@50 12:1920x1080@50 13:1680x1050@60 14:1600x900@60 15:1280x1024@60 16:1440x900@60 17:1280x800@60 18:1280x720@60 19:1280x720@60 20:1280x720@60 21:1280x720@50 22:1024x768@60 23:800x600@60 24:720x576@50 25:720x576@50 26:720x480@60 27:720x480@60 28:720x480@60 29:720x480@60 30:640x480@60 31:640x480@60 32:640x480@60 33:720x400@70
Geometry: 0,0 1920x1080
Scale: 2
Rotation: 1
Overscan: 0
Vrr: incapable
RgbRange: Automatic
HDR: incapable
Wide Color Gamut: incapable
ICC profile: none
Color profile source: sRGB
Color power preference: prefer efficiency and performance
Brightness control: supported, set to 91% and dimming to 100%
DDC/CI: allowed
Color resolution: automatic (10), range: [6; 12] bits per color
Allow EDR: unsupported
ddcutil --version
ddcutil 1.4.1
Built with support for USB connected displays.
Built without function failure simulation.
Built with libdrm services.
Copyright (C) 2015-2023 Sanford Rockowitz
License GPLv2: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Thanks. I'll let those with more knowledge about the brightness code take it from here. It sounds like the display forgets the brightness value when it's turned off... Perhaps powerdevil isn't telling the display to permanently save it, or we should be setting it again after dpms on. *** This bug has been marked as a duplicate of bug 503268 *** |
Created attachment 184218 [details] Screenshot of the menu in question SUMMARY Setting the monitor brightness to 90% using the Plasma menu item (lower right corner) works successfully. However, after waking up from suspend the brightness is reduced. Clicking the menu still shows the requested brightness (90%), but I have to move the slider to another value (91%, say) to get a correct brightness again. STEPS TO REPRODUCE 1. Set a monitor brightness using the menu item 2. Suspend and wakeup 3. The monitor brightness is now lower than it was even though the value shown in the menu is correct. 4. Move the menu slider to another value - the monitor brightness is now correct for that new value. OBSERVED RESULT The monitor is dimmer than it should be. EXPECTED RESULT The monitor brightness should match that set in the menu item. SOFTWARE/OS VERSIONS KDE Plasma Version: 6.4.4 KDE Frameworks Version: 6.17.0 Qt Version: 6.9.1 Kernel Version: 6.14.0-27-generic (64-bit) Graphics Platform: Wayland Processors: 4 × Intel® Core™ i3-5005U CPU @ 2.00GHz Memory: 9 GB of RAM (8.2 GB usable) Graphics Processor: Intel® HD Graphics 5500 ADDITIONAL INFORMATION Output of ddcutil detect: Display 1 I2C bus: /dev/i2c-5 DRM connector: card1-DP-1 EDID synopsis: Mfg id: HPN - UNK Model: HP Z27 Product code: 13622 (0x3536) Serial number: CN493817V8 Binary serial number: 0 (0x00000000) Manufacture year: 2019, Week: 38 VCP version: 2.2