9.0 Pie – Are there any shortcuts to adjust the brightness unintentionally on a Huawei Nova 3i (Android 9)

I try to help a visually impaired older person with his phone. She found that when the automatic brightness setting is turned on, the screen is too dark for her to see.

Without the automatic brightness enabled, it somehow manages to reduce the brightness by mistake. I wonder if there is a shortcut that reduces the brightness.

unit – how to make sure that the UI hardware ignores the lighting of the scenes and has the same brightness as the albedo?

Oh. So I tried to apply a show before and it did not work because I thought I could not use the albedo texture for the show.

But it's totally wrong.

Using the same texture as that used for albedo as an emitter board gives the material the same brightness that you have in an image viewer (assuming all the other stage lights ignore the material).

EDIT: a wrinkle: If you dare to adjust the multiplier, it is very difficult to be sure to return to the default setting.

Unable to change MacBook's screen brightness immediately after reboot

I have a problem with the brightness of my MacBook Pro 13-inch (mid-2014). Immediately after rebooting, the brightness keys do nothing – the brightness of the display does not change. If I close the lid of the screen and then reopen it, the brightness keys start to adjust the brightness correctly.

What I have tried so far:
– reset SMC
– NVRAM reset
– Enable / disable the automatic brightness adjustment in the display settings
– open the MacBook case and disconnect and reconnect the screen cable

Something else worth to try?

xrandr does not work on Ubuntu 19.04. How to reduce the brightness below the default minimum?

The xrandr command to reduce the brightness below the minimum does not work after upgrading from Ubuntu to 19.04. How can I reduce the brightness below the default minimum?

v4l – v4l2 only displays brightness control

I want to see what I can set on my Logitech C270 camera. I download the v4l2 and seize

v4l2-ctl –all

and shows

Driver Information (do not use libv4l2):
Driver name: uvcvideo
Card type: Webcam VirtualBox - Logitech HD
Bus Infos: usb-0000: 00: 0c.0-1
Driver Version: 4.15.18
Capacities: 0x84200001
Video capture
Extended Pix format
Capacities of the device
Device Caps: 0x04200001
Video capture
Extended Pix format
Priority: 2
Video input: 0 (Camera 1: ok)
Format the video capture:
Width / Height: 640/480
Pixel format: MJPG & # 39;
Field: none
Bytes per line: 0
Size image: 1228800
Color space: sRGB
Transfer function: default (mapped to sRGB)
YCbCr / HSV encoding: default (maps to ITU-R 601)
Quantize: default (maps to the full range)
Video capture of the ability to crop:
Bounds: Left 0, Top 0, Width 640, Height 480
Default: Left 0, High 0, Width 640, Height 480
Aspect of the pixel: 1/1
Selection: crop_default, Left 0, Top 0, Width 640, Height 480
Selection: crop_bounds, Left 0, Top 0, Width 640, Height 480
Streaming Video Capture Settings:
Capabilities: timeperframe
Frames per second: 15,000 (15/1)
Read the stamps: 0
brightness 0x00980900 (int): min = 0 max = 100 steps = 1 default = 50 value = 50

However, as I see it on the other website, it seems that this camera should have other controls. But I can only see the brightness here.

What did I miss?

colors – Does the contrast / brightness of the monitor change frequently?

I have a VERY old Dell external monitor, which works well most of the time, but my eyes also get VERY old 🙂 I find that I need a lot more contrast when working on my Windows machine 10 Pro. Or is it just the brightness I need?

What happens is that sometimes it's fine, the blacks are black, the colors are normal, a lot of contrast. However, at random, it will suddenly "disappear". Blacks are now gray, colors are now faded, etc. If I refresh the page, it becomes clear again, but sooner or later, it fades again. And considering how today's kids seem to love the script of using VERY blue or light gray text on a white background (an ADA violation, besides, look at the), when the screen is emptied, these pages are almost invisible.

The windows contrast options / enhancements I've tried do not work very well in this regard. I just want to see black / dark prints on a white / light background. Some of them changed the screen to a yellow text on a black bg. Not useful 🙂

I obviously try to avoid buying a new monitor, but if it 's actually a symptom of a seriously aging or faulty monitor, I Maybe he'll have to bite the bullet, damn it.



Charlotte NC

Which drivers treat the brightness of the screen?

I am trying to create a kext that will allow me to lower the minimum brightness of the display. Which pilots would be relevant for this? Would it be like an I / O kit driver?

This is macOS 10.14.4

dell – The update to 19.04 changes the minimum brightness range of 18.04

After updating ubuntu to 19.04, I noticed that the minimum brightness of my laptop was higher than that of 18.04.

Set the screen as dark as the graphical interface allows me and works cat / sys / class / backlight / intel_backlight / brightness reports 1200.

To confirm this, I've loaded my usb with Ubuntu 18.04 to start live.
If you restart the same command, the 1.Max brightness is fixed at 120000; it is still very dark, but I would appreciate having this very dark back.

The laptop in question is a Dell XPS 15 9570.

I've tried setting some startup parameters, such as acpi_backlight = video / vendor / native, but nothing seems to allow me to set the brightness to 1, they all stop at 1200.

I've since figured out how to change the brightness by doing sudo su -c "echo 1> / sys / class / backlight / intel_backlight / brightness" and the screen darkens an appreciable amount. So I am curious to know if the brightness range of the GUI is 1-120000.

nvidia – The brightness is not changed in Ubuntu 18.10 in Dell Inspiron 5577

I had dual booted my Dell Inspiron 5577 i5 notebook (Nvidia Geforce 1050) with Windows 10 as Ubuntu 18.04. But it seems that there is no option to change the brightness in the options from the settings in the upper right corner of the screen.
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Function keys for which brightness does not work (F11, F12)
(The other function keys work well.)

In addition, I tried to install third party software to change the brightness, but they did not work.

Also tried to make changes in Grub from:

GRUB_CMDLINE_LINUX_DEFAULT = "silent bootname"


GRUB_CMDLINE_LINUX_DEFAULT = "silent bootname acpi_backlight = vendor"

and that too:

"RegistryDwords" option "EnableBrightnessControl = 1"

But that did not work either.

In addition, I tried writing a shell script and adding a user-defined keyboard shortcut to adjust the brightness, but it did not work for me.

I upgraded to Ubuntu 18.10 but none of the above solutions worked. (Ubuntu 18.10 is currently used)

Details of the currently installed Ubuntu:
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(I do not know if it is relevant, but I have tried updating the Nvidia driver and, after the completion and restart, my laptop has not started. It was therefore necessary to uninstall the Nvidia driver update again, so the driver has not yet upgraded.

Does any one have a solution?

Is it possible to control the brightness of the screen from a keyboard other than Apple?

I'm using a Poker II mechanical keyboard with an Apple Cinema Display, but I think it's a common problem for people using a non-Apple keyboard with their built-in Macbook screen or similar. Is there a way to link some keys to control the brightness?