Re: [arch-general] Nvidia backlight control - acpi_video0/brightness changes - display doesn't?

On 11/20/2016 03:56 AM, Ralf Mardorf wrote: > Are you using the "helper script" because > > sudo echo $(luminance) > "$dest"/brightness > > doesn't work? If so, then consider to use > > echo $(luminance) | sudo tee "$dest"/brightness > > to get rid of the "helper script". > > Regards, >

Re: [arch-general] Nvidia backlight control - acpi_video0/brightness changes - display doesn't?

Well, this won't work for me. I don't have a NVidia. But I will search the web if there is a module for my Intel Skylake graphics. Although my brightness script actually works perfect. The only drawback currently: a few apps (e.g. chromium) reset the brightness to max upon their startup. Thanks

Re: [arch-general] Nvidia backlight control - acpi_video0/brightness changes - display doesn't?

On Sun, 20 Nov 2016 10:56:16 +0100, Ralf Mardorf wrote: >On Sun, 20 Nov 2016 03:08:12 -0600, David C. Rankin wrote: >>if [ $UID -eq 0 ]; then >>echo $(luminance) > "$dest"/brightness > >Are you using the "helper script" because > > sudo echo $(luminance) > "$dest"/brightness >

Re: [arch-general] Nvidia backlight control - acpi_video0/brightness changes - display doesn't?

On Sun, 20 Nov 2016 03:08:12 -0600, David C. Rankin wrote: >if [ $UID -eq 0 ]; then >echo $(luminance) > "$dest"/brightness Are you using the "helper script" because sudo echo $(luminance) > "$dest"/brightness doesn't work? If so, then consider to use echo $(luminance) | sudo

Re: [arch-general] Nvidia backlight control - acpi_video0/brightness changes - display doesn't?

On 11/19/2016 03:38 AM, Christian Klaue wrote: > I am having exactly the same problem with my HP. I went as far as > decompiling the ACPI bios. When I tried to compile it again, it threw a > huge amount of errors. So I gave up. I didn't find any solution for my > problem. I even tried other

Re: [arch-general] Nvidia backlight control - acpi_video0/brightness changes - display doesn't?

Hi, your xrandr --brightness solution only works on oled screens. Those don't have a backlight. From a quick search it looks like you have a LCD, right? I am having exactly the same problem with my HP. I went as far as decompiling the ACPI bios. When I tried to compile it again, it threw a

Re: [arch-general] Nvidia backlight control - acpi_video0/brightness changes - display doesn't?

On 11/19/2016 03:09 AM, David C. Rankin wrote: > I'll go search to see if I can find the difference, but if you have a > favorite link, I'd appreciate the help. Got it. xrandr is software rendered darkening of pixel - no hardware control involved. Thanks. -- David C. Rankin, J.D.,P.E.

Re: [arch-general] Nvidia backlight control - acpi_video0/brightness changes - display doesn't?

On 11/19/2016 02:35 AM, Patrick Burroughs (Celti) via arch-general wrote: > acpi_backlight=vendor is the default, acpi_backlight=none is invalid. > The option you are looking for is acpi_backlight=video, which takes the > backlight control away from the vendor driver and hands it back over to >

Re: [arch-general] Nvidia backlight control - acpi_video0/brightness changes - display doesn't?

On Sat, 19 Nov 2016 02:00:11 -0600 "David C. Rankin" wrote: > [snip a whole bunch of maundering] xrandr does not adjust the backlight. It adjusts the brightness, which while it may have the same visible effect may have negative effects on battery life and

Re: [arch-general] Nvidia backlight control - acpi_video0/brightness changes - display doesn't?

On 11/18/2016 11:17 PM, David C. Rankin wrote: > On 11/18/2016 11:02 PM, David C. Rankin wrote: >> I've got to get something figured out. This laptop will absolutely blind you >> when you open a browser, or anything with a white background. I have the >> backlight set at 40% in win10 and that

Re: [arch-general] Nvidia backlight control - acpi_video0/brightness changes - display doesn't?

On 11/18/2016 11:02 PM, David C. Rankin wrote: > I've got to get something figured out. This laptop will absolutely blind you > when you open a browser, or anything with a white background. I have the > backlight set at 40% in win10 and that works well. Here it looks like it is on > MAX

Re: [arch-general] Nvidia backlight control - acpi_video0/brightness changes - display doesn't?

On 11/18/2016 03:56 AM, Warp wrote: > Do you use any special kernel boot parameters? > > Using "acpi_backlight=vendor" helped me in a similar situation, though it > was about another option interfering with backlight control. > > Sylvain Thanks Sylvain, I've tried with both

Re: [arch-general] Nvidia backlight control - acpi_video0/brightness changes - display doesn't?

On November 18, 2016 6:42:40 AM GMT+01:00, "David C. Rankin" wrote: >On 11/17/2016 04:31 PM, David C. Rankin wrote: >> All, >> >> Laptop: HP 8760w, Quadro 3000M, nvidia-340xx packages. >> >> The driver works perfectly (no errors in Xorg.0.log), but I have

Re: [arch-general] Nvidia backlight control - acpi_video0/brightness changes - display doesn't?

On 11/17/2016 04:31 PM, David C. Rankin wrote: > All, > > Laptop: HP 8760w, Quadro 3000M, nvidia-340xx packages. > > The driver works perfectly (no errors in Xorg.0.log), but I have no way to > control the screen brightness. I've followed the suggestions in: > >

[arch-general] Nvidia backlight control - acpi_video0/brightness changes - display doesn't?

All, Laptop: HP 8760w, Quadro 3000M, nvidia-340xx packages. The driver works perfectly (no errors in Xorg.0.log), but I have no way to control the screen brightness. I've followed the suggestions in: https://wiki.archlinux.org/index.php/NVIDIA/Tips_and_tricks but I still have no