Display darker in Arch than in Windows 10

jbodhorn · 2016-10-13 23:38:52

I got a new laptop and a few days ago i installed Arch with gnome along side Ubuntu and Windows 10. I noticed that my screen isn't as bright in Arch as it is in Windows 10

[joe@Arch-Flex-3 ~]$ lspci -k
00:00.0 Host bridge: Intel Corporation Skylake Host Bridge/DRAM Registers (rev 08)
	Subsystem: Lenovo Device 3828
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 520 (rev 07)
	Subsystem: Lenovo Device 3828
	Kernel driver in use: i915
	Kernel modules: i915
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
	Subsystem: Lenovo Device 3828
	Kernel driver in use: xhci_hcd
	Kernel modules: xhci_pci
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
	Subsystem: Lenovo Device 3828
	Kernel driver in use: intel_pch_thermal
	Kernel modules: intel_pch_thermal
00:15.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 (rev 21)
	Subsystem: Lenovo Device 3828
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21)
	Subsystem: Lenovo Device 3828
	Kernel driver in use: mei_me
	Kernel modules: mei_me
00:17.0 SATA controller: Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode] (rev 21)
	Subsystem: Lenovo Device 3828
	Kernel driver in use: ahci
	Kernel modules: ahci
00:1c.0 PCI bridge: Intel Corporation Device 9d10 (rev f1)
	Kernel driver in use: pcieport
	Kernel modules: shpchp
00:1c.4 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #5 (rev f1)
	Kernel driver in use: pcieport
	Kernel modules: shpchp
00:1c.5 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #6 (rev f1)
	Kernel driver in use: pcieport
	Kernel modules: shpchp
00:1f.0 ISA bridge: Intel Corporation Sunrise Point-LP LPC Controller (rev 21)
	Subsystem: Lenovo Device 3828
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
	Subsystem: Lenovo Device 3828
	Kernel driver in use: intel_pmc_core
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
	Subsystem: Lenovo Device 3828
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd_hda_intel, snd_soc_skl
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
	Subsystem: Lenovo Device 3828
	Kernel driver in use: i801_smbus
	Kernel modules: i2c_i801
01:00.0 3D controller: NVIDIA Corporation GM108M [GeForce 940M] (rev a2)
	Subsystem: Lenovo Device 3829
	Kernel driver in use: nvidia
	Kernel modules: nouveau, nvidia_drm, nvidia
02:00.0 Network controller: Intel Corporation Intel Dual Band Wireless-AC 3165 Plus Bluetooth (rev 79)
	Subsystem: Intel Corporation Device 4210
	Kernel driver in use: iwlwifi
	Kernel modules: iwlwifi
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)
	Subsystem: Lenovo Device 3835
	Kernel driver in use: r8169
	Kernel modules: r8169

In my system settings for gnome my brightness is all the way up, the only time I really seem to notice how dark my screen is, is when I'm watching video, Netflix in particular. Is there any way to make my display as bright in Windows?

jbodhorn · 2016-10-14 20:18:45

I decided to actually use Ubuntu last night to see if my screen was any brighter than it is in Arch, it's definitely not any better in Ubuntu so I'm having the same issue in both OS's. I'm guessing that is because they are both using the same drivers. I was hoping there is some way to make adjustments either with gui, command, or by conf file. I've been a bit busy finishing up a project on arch arm and haven't really had a chance to do any digging regarding this issue.

R00KIE · 2016-10-15 01:03:54

Are you absolutely sure it is actual brightness and not just gamma curve differences? Did you test with a full screen all white image?

You can try fiddling with some of the files in '/sys/class/backlight/intel_backlight/' but I doubt you will be able to get more brightness than what you already get you what you have tried so far.

NoSuck · 2016-10-15 06:06:55

I was hoping there is some way to make adjustments either with gui, command, or by conf file.

That would be either xbacklight -inc $u or xrandr --output "$display" --brightness $u, the former being a hardware change, the latter being a software overlay.

I decided to actually use Ubuntu last night to see if my screen was any brighter than it is in Arch...

Good thinking. You'll do fine.

jbodhorn · 2016-10-16 19:59:43

R00KIE wrote:

Are you absolutely sure it is actual brightness and not just gamma curve differences? Did you test with a full screen all white image?
You can try fiddling with some of the files in '/sys/class/backlight/intel_backlight/' but I doubt you will be able to get more brightness than what you already get you what you have tried so far.

Honestly no I'm not sure, I've never had an issue like this come up before. I'll do some googling now that I have a suggestion as to what I should be looking for, thanks.

Arch Linux

#1 2016-10-13 23:38:52

Display darker in Arch than in Windows 10

#2 2016-10-14 20:18:45

Re: Display darker in Arch than in Windows 10

#3 2016-10-15 01:03:54

Re: Display darker in Arch than in Windows 10

#4 2016-10-15 06:06:55

Re: Display darker in Arch than in Windows 10

#5 2016-10-16 19:59:43

Re: Display darker in Arch than in Windows 10

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