| Summary: | external screen brightness is not restored after screen wakeup | ||
|---|---|---|---|
| Product: | [Plasma] Powerdevil | Reporter: | Jos van den Oever <jos> |
| Component: | general | Assignee: | Jakob Petsovits <jpetso> |
| Status: | ASSIGNED --- | ||
| Severity: | normal | CC: | aria, chermnykh2001, gudvinr+kde, gwarser, heinep, jeisom, jpetso, kde, kde, matejm98mthw, mecirt, mtjhrj, natalie_clarius, nate, phil.hord, postix, slartibart70 |
| Priority: | HI | Keywords: | regression |
| Version: | 6.0.4 | ||
| Target Milestone: | --- | ||
| Platform: | Other | ||
| OS: | Linux | ||
| See Also: | https://bugs.kde.org/show_bug.cgi?id=489056 | ||
| Latest Commit: | Version Fixed In: | ||
| Sentry Crash Report: | |||
|
Description
Jos van den Oever
2022-04-11 08:53:16 UTC
The monitor is visible like this:
```
$ ddcutil detect
Display 1
I2C bus: /dev/i2c-9
EDID synopsis:
Mfg id: GSM
Model: LG HDR 4K
Product code: 30471
Serial number:
Binary serial number: [..]
Manufacture year: [..]
VCP version: 2.1
```
Same issue here, since powerdevil started depending on ddcutil (Arch Linux), every time my screen turns on after it was off for a while its brightness resets to zero but the value in the battery applet remains the same. (In reply to Matej Mrenica from comment #2) > Same issue here, since powerdevil started depending on ddcutil (Arch Linux), > every time my screen turns on after it was off for a while its brightness > resets to zero but the value in the battery applet remains the same. In my case however, I only use one screen (desktop). I have same issue with AMD GPU and 2 external displays (DP and HDMI). Those displays also happen to be only displays I have since it's desktop. However, for some reason brightness only gets reset to 0 only sometimes and it's not fully reproducible. Operating System: Arch Linux KDE Plasma Version: 5.27.7 KDE Frameworks Version: 5.108.0 Qt Version: 5.15.10 Kernel Version: 6.1.46-1-lts (64-bit) Graphics Platform: X11 Graphics Processor: AMD Radeon RX Vega M GL Graphics *** Bug 486500 has been marked as a duplicate of this bug. *** *** Bug 421492 has been marked as a duplicate of this bug. *** *** Bug 423457 has been marked as a duplicate of this bug. *** I collected various thoughts in this developer-focused issue titled "Dimming Rework": https://invent.kde.org/plasma/powerdevil/-/issues/38 I'm still not sure if specifically dimming-related bugs such as Bug 484129 or Bug 486500 (which was closed as duplicate of this one) are indeed the same thing as what you're seeing here, but I'm confident that the eventual fix will address all of these kinds of bugs at once. (In reply to Jakob Petsovits from comment #8) > I collected various thoughts in this developer-focused issue titled "Dimming > Rework": https://invent.kde.org/plasma/powerdevil/-/issues/38 Thanks for the attention to this, Jakob. I am experiencing these problems on my laptop with internal and external displays since KWin 6.2 arrived. On mine, it seems to be racy in that sometimes the persisted (30%) values are applied to the screens but the KWin applet still shows 100% for one of the displays. I captured the persisted difference by saving the config during the failure and then after resolving it. $ cp ~/.config/kwinoutputconfig.json /tmp/before-kwinoutputconfig.json # ... resolved using issue with KWin dialog ... $ cp ~/.config/kwinoutputconfig.json /tmp/after-kwinoutputconfig.json $ diff /tmp/before-kwinoutputconfig.json /tmp/after-kwinoutputconfig.json 6c6 < "brightness": 0.3, --- > "brightness": 1, 29c29 < "brightness": 0.3, --- > "brightness": 1, It would be helpful to know what other information could be useful for analyzing these problems. I tried probing with ddcutil, but it's not installed. $ ddcutil detect zsh: command not found: ddcutil What else can we check, and should we report it here or somewhere else? Operating System: KDE neon 6.2 KDE Plasma Version: 6.2.0 KDE Frameworks Version: 6.6.0 Qt Version: 6.7.2 Kernel Version: 6.8.0-47-generic (64-bit) Graphics Platform: Wayland Processors: 8 × Intel® Core™ i7-10610U CPU @ 1.80GHz Memory: 15.3 GiB of RAM Graphics Processor: Mesa Intel® UHD Graphics Manufacturer: LENOVO Product Name: 20UCS4TR00 System Version: ThinkPad X1 Yoga Gen 5 A relevant merge request has been opened @ https://invent.kde.org/plasma/powerdevil/-/merge_requests/466 This would take care of restoring non-dimmed brightness of reconnected displays after wake-up. With an additional Wayland dimming protocol for KWin, we should be able to also restore non-dimmed brightness after a reboot (not part of this particular merge request). *** Bug 495289 has been marked as a duplicate of this bug. *** *** Bug 494588 has been marked as a duplicate of this bug. *** |