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[SOLVED] KDE5 laptop screen dimming problem
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Saundersx
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PostPosted: Fri Sep 11, 2015 12:21 pm    Post subject: [SOLVED] KDE5 laptop screen dimming problem Reply with quote

I have an MSI GE60 laptop, before upgrading to kde5 the function up/down keys would dim/lighten the screen but after the upgrade they stopped working. I know it still works as I can manually echo a value into /sys/xxx to dim it manually. Also the function left/right still works for controlling audio.

It this a known issue? I cannot find information on it anywhere.


Last edited by Saundersx on Fri Sep 18, 2015 9:25 pm; edited 1 time in total
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Saundersx
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PostPosted: Wed Sep 16, 2015 7:00 am    Post subject: Reply with quote

more info. The following dims the screen

echo 1600 > /sys/class/backlight/intel_backlight/brightness

and some dmesg stuffs

Code:
dmesg|grep -iE "(wmi|msi)"
[    0.000000] ACPI: RSDP 0x00000000000F04A0 000024 (v02 MSI_NB)
[    0.000000] ACPI: XSDT 0x00000000CB4A10A0 0000BC (v01 MSI_NB MEGABOOK 01072009 AMI  00010013)
[    0.000000] ACPI: FACP 0x00000000CB4AE240 00010C (v05 MSI_NB MEGABOOK 01072009 AMI  00010013)
[    0.000000] ACPI: DSDT 0x00000000CB4A11E8 00D057 (v02 MSI_NB MEGABOOK 00000037 INTL 20120711)
[    0.000000] ACPI: APIC 0x00000000CB4AE350 000092 (v03 MSI_NB MEGABOOK 01072009 AMI  00010013)
[    0.000000] ACPI: FPDT 0x00000000CB4AE3E8 000044 (v01 MSI_NB MEGABOOK 01072009 AMI  00010013)
[    0.000000] ACPI: FIDT 0x00000000CB4AE430 00009C (v01 MSI_NB MEGABOOK 01072009 AMI  00010013)
[    0.000000] ACPI: MSDM 0x00000000CB4AE578 000055 (v03 MSI_NB MEGABOOK 01072009 AMI  00010013)
[    0.000000] ACPI: SLIC 0x00000000CB4AE988 000176 (v01 MSI_NB MEGABOOK 01072009 AMI  00010013)
[    0.000000] ACPI: MCFG 0x00000000CB4AFB50 00003C (v01 MSI_NB MEGABOOK 01072009 MSFT 00000097)
[    0.000000] ACPI: HPET 0x00000000CB4AFB90 000038 (v01 MSI_NB MEGABOOK 01072009 AMI. 00000005)
[    0.000000] ACPI: MSFF 0x00000000CB4B49D0 000029 (v01 MSI_NB MEGABOOK 00000010 AMI  00010013)
[    0.221191] acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI]
[    0.250938] pnp 00:06: Plug and Play ACPI device, IDs MSI0007 PNP030b (active)
[    0.298552] pci 0000:03:00.0: set MSI_INTX_DISABLE_BUG flag
[    0.999519] wmi: Mapper loaded
[    1.020541] input: MSI WMI hotkeys as /devices/virtual/input/input5
[    1.025136] rtsx_pci 0000:04:00.0: rtsx_pci_acquire_irq: pcr->msi_en = 1, pci->irq = 29
[    1.823443] usb 2-1.4: Product: MSI EPF USB
[    1.823444] usb 2-1.4: Manufacturer: MSI EPF USB
[    1.823444] usb 2-1.4: SerialNumber: MSI EPF USB
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AnOriginalNick
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PostPosted: Thu Sep 17, 2015 2:07 pm    Post subject: Reply with quote

You might want to look at this topic:
https://forums.gentoo.org/viewtopic-p-7805658.html#7805658
Do note that you'll have to modify my solution if there is no users group on your system but it is trivial.
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Saundersx
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PostPosted: Fri Sep 18, 2015 9:24 pm    Post subject: Reply with quote

That fixed it, and an easy fix too. Perhaps that should be added to an ebuild somewhere.
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