Screen Brightness slider not working - Gnome 3.32.2

Hello
I have installed Rocky 8.9 on a Dell 7530 and I find that the screen brightness slider has no effect on the screen.

Screenshot from 2023-12-28 19-28-50

Neither the desktop slider or the Power prefs slider have any effect. The screen works but is a bit dull for my needs. Any ideas how I can get it working?
Many thanks

Hi,

I would suspect its a driver issue, but it looks like that model can come with with various graphics cards. Could you please provide the specs of the laptop?

Also are you using wayland or x11?

Regards Tom.

HelloTom
Thanks for your interest.

echo $XDG_SESSION_TYPE
x11

sudo lshw -short
H/W path               Device          Class          Description
=================================================================
                                       system         Precision 7530 (0831)
/0                                     bus            03RV2M
/0/0                                   memory         64KiB BIOS
/0/42                                  memory         32GiB System Memory
/0/42/0                                memory         8GiB SODIMM DDR4 Synchronous 2667 MHz (0.4 ns)
/0/42/1                                memory         8GiB SODIMM DDR4 Synchronous 2400 MHz (0.4 ns)
/0/42/2                                memory         8GiB SODIMM DDR4 Synchronous 2667 MHz (0.4 ns)
/0/42/3                                memory         8GiB SODIMM DDR4 Synchronous 2400 MHz (0.4 ns)
/0/4d                                  memory         384KiB L1 cache
/0/4e                                  memory         1536KiB L2 cache
/0/4f                                  memory         9MiB L3 cache
/0/50                                  processor      Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz
/0/100                                 bridge         8th Gen Core Processor Host Bridge/DRAM Registers
/0/100/1                               bridge         6th-10th Gen Core Processor PCIe Controller (x16)
/0/100/1/0                             display        GP107GLM [Quadro P1000 Mobile]
/0/100/1/0.1           card1           multimedia     GP107GL High Definition Audio Controller
/0/100/1/0.1/0         input10         input          HDA NVidia HDMI/DP,pcm=3
/0/100/1/0.1/1         input11         input          HDA NVidia HDMI/DP,pcm=7
/0/100/1/0.1/2         input12         input          HDA NVidia HDMI/DP,pcm=8
/0/100/1/0.1/3         input13         input          HDA NVidia HDMI/DP,pcm=9
/0/100/4                               generic        Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem
/0/100/8                               generic        Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
/0/100/12                              generic        Cannon Lake PCH Thermal Controller
/0/100/14                              bus            Cannon Lake PCH USB 3.1 xHCI Host Controller
/0/100/14/0            usb1            bus            xHCI Host Controller
/0/100/14/0/a                          generic        5880
/0/100/14/0/b                          multimedia     Integrated Webcam_HD
/0/100/14/0/e                          communication  Wireless-AC 9260 Bluetooth Adapter
/0/100/14/1            usb2            bus            xHCI Host Controller
/0/100/14/1/1          scsi0           storage        EXTERNAL_USB
/0/100/14/1/1/0.0.0    /dev/sda        disk           4TB EXTERNAL_USB
/0/100/14/1/1/0.0.0/1  /dev/sda1       volume         199MiB Windows FAT volume
/0/100/14/1/1/0.0.0/2  /dev/sda2       volume         3629GiB data partition
/0/100/14.2                            memory         RAM memory
/0/100/15                              bus            Cannon Lake PCH Serial IO I2C Controller #0
/0/100/15.1                            bus            Cannon Lake PCH Serial IO I2C Controller #1
/0/100/16                              communication  Cannon Lake PCH HECI Controller
/0/100/17                              storage        Cannon Lake Mobile PCH SATA AHCI Controller
/0/100/1b                              bridge         Cannon Lake PCH PCI Express Root Port #17
/0/100/1b/0            /dev/nvme0      storage        CT1000P2SSD8
/0/100/1b/0/0          /dev/ng0n1      disk           NVMe disk
/0/100/1b/0/1          /dev/nvme0n1    disk           1TB NVMe disk
/0/100/1b/0/1/1                        volume         599MiB Windows FAT volume
/0/100/1b/0/1/2                        volume         1023MiB EFI partition
/0/100/1b/0/1/3        /dev/nvme0n1p3  volume         847GiB LVM Physical Volume
/0/100/1b.4                            bridge         Cannon Lake PCH PCI Express Root Port #21
/0/100/1b.4/0          /dev/nvme1      storage        SSDPEKKF512G8 NVMe INTEL 512GB
/0/100/1b.4/0/0        /dev/ng1n1      disk           NVMe disk
/0/100/1b.4/0/1        /dev/nvme1n1    disk           512GB NVMe disk
/0/100/1b.4/0/1/1      /dev/nvme1n1p1  volume         599MiB Windows FAT volume
/0/100/1b.4/0/1/2      /dev/nvme1n1p2  volume         393GiB LVM Physical Volume
/0/100/1c                              bridge         Cannon Lake PCH PCI Express Root Port #1
/0/100/1c.5                            bridge         Cannon Lake PCH PCI Express Root Port #6
/0/100/1c.5/0          mmc0            bus            RTS5260 PCI Express Card Reader
/0/100/1c.5/0/1        /dev/mmcblk0    disk           62GB SD64G
/0/100/1c.5/0/1/1      /dev/mmcblk0p1  volume         57GiB Windows FAT volume
/0/100/1c.6                            bridge         Cannon Lake PCH PCI Express Root Port #7
/0/100/1c.6/0          wlp112s0        network        Wireless-AC 9260
/0/100/1d                              bridge         Cannon Lake PCH PCI Express Root Port #9
/0/100/1d/0            /dev/nvme2      storage        CT1000P5PSSD8
/0/100/1d/0/0          /dev/ng2n1      disk           NVMe disk
/0/100/1d/0/1          /dev/nvme2n1    disk           1TB NVMe disk
/0/100/1d/0/1/1        /dev/nvme2n1p1  volume         848GiB Linux LVM Physical Volume partition
/0/100/1f                              bridge         Cannon Lake LPC Controller
/0/100/1f/0                            system         PnP device PNP0c02
/0/100/1f/1                            system         PnP device PNP0b00
/0/100/1f/2                            generic        PnP device INT3f0d
/0/100/1f/3                            input          PnP device PNP0303
/0/100/1f/4                            system         PnP device PNP0c02
/0/100/1f/5                            system         PnP device PNP0c02
/0/100/1f/6                            system         PnP device PNP0c02
/0/100/1f/7                            system         PnP device PNP0c02
/0/100/1f.3            card0           multimedia     Cannon Lake PCH cAVS
/0/100/1f.3/0          input14         input          HDA Intel PCH Headphone Mic
/0/100/1f.4                            bus            Cannon Lake PCH SMBus Controller
/0/100/1f.5                            bus            Cannon Lake PCH SPI Controller
/0/100/1f.6            eno1            network        Ethernet Connection (7) I219-LM
/1                                     power          DELL GW0K999
/2                     /dev/fb0        display        EFI VGA
/3                     input0          input          Lid Switch
/4                     input1          input          Power Button
/5                     input18         input          DELL0831:00 044E:1220 Mouse
/6                     input19         input          DELL0831:00 044E:1220 Touchpad
/7                     input2          input          Sleep Button
/8                     input20         input          DELL0831:00 044E:1220 UNKNOWN
/9                     input3          input          Power Button
/a                     input4          input          AT Translated Set 2 keyboard
/b                     input5          input          Video Bus
/c                     input6          input          Intel HID events
/d                     input7          input          Intel HID 5 button array
/e                     input8          input          PC Speaker
/f                     input9          input          Dell WMI hotkeys
(base) [admin@LOWROCKY ~]$ 
nvidia-smi
Thu Dec 28 22:56:24 2023       
+---------------------------------------------------------------------------------------+
| NVIDIA-SMI 545.23.08              Driver Version: 545.23.08    CUDA Version: 12.3     |
|-----------------------------------------+----------------------+----------------------+
| GPU  Name                 Persistence-M | Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp   Perf          Pwr:Usage/Cap |         Memory-Usage | GPU-Util  Compute M. |
|                                         |                      |               MIG M. |
|=========================================+======================+======================|
|   0  Quadro P1000                   Off | 00000000:01:00.0  On |                  N/A |
| N/A   51C    P8              N/A / ERR! |    436MiB /  4096MiB |      9%      Default |
|                                         |                      |                  N/A |
+-----------------------------------------+----------------------+----------------------+
                                                                                         
+---------------------------------------------------------------------------------------+
| Processes:                                                                            |
|  GPU   GI   CI        PID   Type   Process name                            GPU Memory |
|        ID   ID                                                             Usage      |
|=======================================================================================|
|    0   N/A  N/A      3635      G   /usr/libexec/Xorg                           129MiB |
|    0   N/A  N/A      3793      G   /usr/bin/gnome-shell                        221MiB |
|    0   N/A  N/A     60394      G   nvidia-settings                               1MiB |
|    0   N/A  N/A     64444      G   ...37,262144 --variations-seed-version       80MiB |
+---------------------------------------------------------------------------------------+

Hi,

A google search found this:

I know this is for centos7.5, but the issue appears to be similar.

Regards Tom.

Thank you Tom for your suggestion. I tried some of the suggestions in the thread but without success. I seem to remember that it did work and I have a horrible feeling it was before I installed the NVIDIA drivers.
I thought about reactivating NOUVEAU in the BIOS … but I really don’t want to break the nvidia drivers that are installed. (My only gripe with linux is how complicated / opaque NVIDIA driver installation management is. I’ve spent to many hours reading how-to install NVIDIA threads to find that my GPU is unusable. The amount of NVIDIA installation threads on this site alone, seems to me proof of my pain).
I was hoping this issue is a GNOME issue and not NVIDIA.
Many thanks and happy new year to you.