[kde] [Bug 507579] New: 0% brightness is like 8% and GPU usage not displayed correctly

[easy_lad]

https://bugs.kde.org/show_bug.cgi?id=507579

            Bug ID: 507579
           Summary: 0% brightness is like 8% and GPU usage not displayed
                    correctly
    Classification: I don't know
           Product: kde
      Version First unspecified
       Reported In:
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: uneasy_latitude544 at simplelogin.com
  Target Milestone: ---

Created attachment 183584
  --> https://bugs.kde.org/attachment.cgi?id=183584&action=edit
stuck at 50%

SUMMARY

After updating to 6.4, setting brightness to 0% is like 8%, increasing to 1%
make it dimmer (actually what 0% should have looked like).


STEPS TO REPRODUCE
1.  set brightness to 0%

OBSERVED RESULT

0% is very bright (like 8% brightness) than it is supposed to be.


EXPECTED RESULT

normal, 0% is very dim and gets bright when increasing the slider.


SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 41
KDE Plasma Version: 6.4.3
KDE Frameworks Version: 6.16.0
Qt Version: 6.8.3
Kernel Version: 6.15.7-100.fc41.x86_64 (64-bit)
Graphics Platform: Wayland

ADDITIONAL INFORMATION

Not sure if relevant, but I think the issue is with GPU, after updating (I was
on 6.3.3), it worked normally, but I think I was using an integrated graphics
(AMD), when I was checking "About this system" in settings, it didn't show the
discrete GPU (Nvidia). Now it does show both. I also checked "System Monitor"
and it is stuck on 50% whatever I do, and in "History" tab "GPU 2 usage" is 0%
and GPU 3 usage is 100%" always.

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