Questions[openchrome](ubuntu)

I have a BIOSTAR P4M900-M7 FE motherboard, which has a VIA P4M900 Chrome9 chipset (yes, old, but powerful for basic usage, everything I need). The point is that I made a new installation of Ubuntu Bionic 18.04.3 (Ubuntu MATE specifically) and installed the free driver for this type of chips, "X.Org X server OpenChrome display driver" (xserver-xorg-video-openchrome package) from the repository. The driver works perfectly, the performance is good (even with compiz and HD videos), but the problem is that I can't change the brightness (essential for me). I already tried with xrandr:

user@os:~$ xrandr --current
Screen 0: minimum 320 x 200, current 1280 x 720, maximum 2044 x 2048
VGA-1 connected primary 1280x720+0+0 (normal left inverted right x axis y axis) 477mm x 268mm
   1920x1080     60.00 +  60.00  
   1680x1050     59.95  
   1400x1050     59.98  
   1600x900      60.00  
   1280x1024     75.02    60.02  
   1440x900      59.89  
   1280x800      59.81  
   1152x864      75.00  
   1280x720      60.00* 
   1024x768      75.03    60.00  
   800x600       75.00    60.32  
   640x480       75.00    59.94  
   720x400       70.08  

and:

user@os:~$ xrandr --output VGA-1 --brightness 0.5
user@os:~$ 

But as you can see, absolutely nothing happens, not even a message or error. The same goes for the gamma command:

user@os:~$ xrandr --output VGA-1 --gamma 0.5:0.5:1.0
user@os:~$ 

However, I tried changing the resolution with:

user@os:~$ xrandr --output VGA-1 --mode 1280x720

and it works perfectly, the resolution is changed without problems.

I did some research and it seems that OpenChorme is configured through the file xorg.conf but, apparently, this file no longer exists as such, but now there is a directory, /usr/share/X11/xorg.conf.d, where they are graphics controller settings separately. The point is that I can't find a file that refers to openchrome anywhere.

xrandr works, because the resolution is changed perfectly with --mode command, but what happens with --brightness and --gamma, why nothing happens? I need a way to change the brightness.

Any help would be greatly appreciated.

So I'm trying to get an older system that has an integrated VIA graphics chipset. It's supported directly by the openchrome driver, which I installed from the repo.

The driver requires setting up xorg.conf, which I did following the manpage instructions

However, when it boots the desktop shows up and becomes garbled, then returns shortly thereafter. I think what' happening is the driver is crashing and it's defaulting to the VESA driver, as that's what's loaded when I call lshw from the commandline.

Anyway, I'm not sure where to begin troubleshooting. I looked through the syslog, but nothing stood out to me.

I have a 32-but linux install and I've checked Xorg.0.log for errors and noted:

[drm] Failed to open DRM device for pci:0000:01:00.0: No such file or directory

dmesg returns the following:

pci 0000:01:00.0: vgaarb: setting as boot VGA device pci 0000:01:00.0: vgaarb: VGA device added: decodes=io+mem,owns=io+mem,locks=none pci 0000:01:00.0: vgaarb: bridge control possible

then later:

pci 0000:01:00.0: Video device with shadowed ROM at [mem 0x000c0000-0x000dffff]

So the PCI address is valid...

I have been experiencing a few problem with my monitor HP TS-19SV even with the newly released Ubuntu 12.04 (although, this had happened before on Ubuntu 11.10, 11.04, 10.10 and 10.04. Basically, from time to time, when I start my computer and got to the Ubuntu's desktop, I see quite a bit of black lines next to my cursor and when I move the cursor up to the limit of the screen, the desktop fills with those weird lines. Something similar happens when a move the cursor at the bottom of the screen. Obviously, an image will be more helpful than my attempt of description:

Look at that rectangle next to my cursor:

When I reach the bottom of the screen:

When I reach the top of the screen:

Has anyone experienced something similar to this?. How can I solve it?.

Thanks a lot

UPDATE:

After running sudo lshw -C video I get this:

 *-display UNCLAIMED     
       description: VGA compatible controller
       product: P4M890 [S3 UniChrome Pro]
       vendor: VIA Technologies, Inc.
       physical id: 0
       bus info: pci@0000:01:00.0
       version: 01
       width: 32 bits
       clock: 66MHz
       capabilities: pm agp agp-3.0 vga_controller bus_master cap_list
       configuration: latency=64 mingnt=2
       resources: memory:d8000000-dbffffff memory:fd000000-fdffffff memory:fe8f0000-fe8fffff

UPDATE II: The answer given by Luis Alvarado solved this issue. There is still a weird fading effect when I shut down / Log out that happens when there is a process waiting to be closed but for the most part, everything is working great.

I have an old machine here with a VIA chipset. The default screen resolution is 800x600 but the monitor is a widescreen LCD monitor which is capable of much more.

I've tried to install the ubuntu 10.04 VIA drivers found on their linux drivers page and I followed the instructions. The ./vinstall completed without a problem and I rebooted.

On reboot Xorg didn't start and the log files say the the driver .so file is missing, cannot be found and therefore there are no screens.

Has anybody managed to get this configuration working? My requirements are really only for a basic desktop on the monitor's default resolution.