[openchrome-users] Problem with brightness and xrandr

[Kevin Brace]

Hi RBZ,

You are probably correct that I broke the code without realizing it.
It is probably because I do not adjust screen brightness, generally.
I only do it from the laptop's keyboard when I need to conserve power.
I should probably add this functionality to the test checklist before a major code release.
The good (?) news is that I am now with my friend who is a better hardware tester than I am, so I will try to reproduce this problem with the hardware we have on hand.
We will probably try to reproduce this bug on HP 2133 mini-note.
This one has essentially the same chipset as Biostar P4M900-M7 FE mainboard.

Regards,

Kevin Brace
Brace Computer Laboratory blog
https://bracecomputerlab.com


> Date: Thu, 3 Feb 2022 06:53:03 +0100 (CET)
> From: RBZ <rbz at keemail.me>
> To: openchrome-users at lists.freedesktop.org
> Subject: [openchrome-users] Problem with brightness and xrandr
> Message-ID: <Muy6gi6--3-2 at keemail.me>
> Content-Type: text/plain; charset="utf-8"
>
> Hi, I have a Biostar P4M900-M7 FE 7.0 motherboard with a VIA P4M900 [Chrome 9 HC] chip. I use Debian 11 and I have installed the "xserver-xorg-video-openchrome 0.6.0-4" package, which is the latest version of the driver found in the Debian repositories.
>
> This driver works perfectly but, when I want to lower or raise the brightness with the command "xrandr --output VGA-1 --brightness <value>", absolutely nothing happens, no error message or anything, the brightness is not change. The strangest thing is that if I install an old version of the driver, like "0.5.0-3", the command works perfectly and I can change the brightness without problems.
>
> Why does the driver only change the brightness with version 5 and not with version 6? both versions work perfectly, except that in version 6 I can't change the brightness (and no error message is shown to tell me where the problem could be). Is there any parameter that I can change in version 6 to solve it? perhaps modifying the xorg.conf file??are there other ways to change in brightness without using xrandr? Thanks in advance.
>
> Here I leave the output of the "inxi -Gxx" command:
>
> Graphics:
> ? Device-1: VIA CN896/VN896/P4M900 [Chrome 9 HC]
> ? vendor: Biostar Microtech Intl Corp driver: N/A bus ID: 01:00.0
> ? chip ID: 1106:3371
> ? Display: server: X.Org 1.19.2 driver: loaded: openchrome
> ? unloaded: fbdev,modesetting,vesa resolution: 1280x720~60Hz s-dpi: 96
> ? OpenGL: renderer: llvmpipe (LLVM 11.0.1 128 bits) v: 4.5 Mesa 20.3.5
> ? compat-v: 3.1 direct render: Yes
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