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nvdia hybrid gpu doesn't work

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jens

I have a laptop with xubuntu and an Intel 4000 and a nvidia 720M hybrid GPU. The latter one requieres the legacy driver 390x which I have installed. Here some quotes from CLI:

Error: couldn't find RGB GLX visual or fbconfig
vb@vb-X550CC:~$ glxgears 
Error: couldn't get an RGB, Double-buffered visual```

 ```apt list --installed | grep mesa

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

libegl-mesa0/impish,now 21.2.2-1ubuntu1 amd64 [installed,automatic]
libgl1-mesa-dri/impish,now 21.2.2-1ubuntu1 amd64 [installed,automatic]
libgl1-mesa-dri/impish,now 21.2.2-1ubuntu1 i386 [installed,automatic]
libglapi-mesa/impish,now 21.2.2-1ubuntu1 amd64 [installed,automatic]
libglapi-mesa/impish,now 21.2.2-1ubuntu1 i386 [installed,automatic]
libglu1-mesa/impish,now 9.0.1-1build1 amd64 [installed,automatic]
libglu1-mesa/impish,now 9.0.1-1build1 i386 [installed,automatic]
libglx-mesa0/impish,now 21.2.2-1ubuntu1 amd64 [installed,automatic]
libglx-mesa0/impish,now 21.2.2-1ubuntu1 i386 [installed,automatic]
libosmesa6/impish,now 21.2.2-1ubuntu1 amd64 [installed,automatic]
libosmesa6/impish,now 21.2.2-1ubuntu1 i386 [installed,automatic]
mesa-utils/impish,now 8.4.0-1build1 amd64 [installed,automatic]
mesa-va-drivers/impish,now 21.2.2-1ubuntu1 amd64 [installed,automatic]
mesa-vdpau-drivers/impish,now 21.2.2-1ubuntu1 amd64 [installed,automatic]
mesa-vulkan-drivers/impish,now 21.2.2-1ubuntu1 amd64 [installed,automatic]
mesa-vulkan-drivers/impish,now 21.2.2-1ubuntu1 i386 [installed,automatic]```


``` apt list --installed | grep nvidia

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

libnvidia-cfg1-390/impish,now 390.144-0ubuntu2 amd64 [installed,automatic]
libnvidia-common-390/impish,impish,now 390.144-0ubuntu2 all [installed,automatic]
libnvidia-compute-390/impish,now 390.144-0ubuntu2 amd64 [installed,automatic]
libnvidia-compute-390/impish,now 390.144-0ubuntu2 i386 [installed,automatic]
libnvidia-decode-390/impish,now 390.144-0ubuntu2 amd64 [installed,automatic]
libnvidia-decode-390/impish,now 390.144-0ubuntu2 i386 [installed,automatic]
libnvidia-encode-390/impish,now 390.144-0ubuntu2 amd64 [installed,automatic]
libnvidia-encode-390/impish,now 390.144-0ubuntu2 i386 [installed,automatic]
libnvidia-fbc1-390/impish,now 390.144-0ubuntu2 amd64 [installed,automatic]
libnvidia-fbc1-390/impish,now 390.144-0ubuntu2 i386 [installed,automatic]
libnvidia-gl-390/impish,now 390.144-0ubuntu2 amd64 [installed,automatic]
libnvidia-gl-390/impish,now 390.144-0ubuntu2 i386 [installed,automatic]
libnvidia-ifr1-390/impish,now 390.144-0ubuntu2 amd64 [installed,automatic]
libnvidia-ifr1-390/impish,now 390.144-0ubuntu2 i386 [installed,automatic]
nvidia-compute-utils-390/impish,now 390.144-0ubuntu2 amd64 [installed,automatic]
nvidia-dkms-390/impish,now 390.144-0ubuntu2 amd64 [installed,automatic]
nvidia-driver-390/impish,now 390.144-0ubuntu2 amd64 [installed]
nvidia-kernel-common-390/impish,now 390.144-0ubuntu2 amd64 [installed,automatic]
nvidia-kernel-source-390/impish,now 390.144-0ubuntu2 amd64 [installed,automatic]
nvidia-prime/impish,impish,now 0.8.17.1 all [installed,automatic]
nvidia-settings/impish,now 470.57.01-0ubuntu3 amd64 [installed,automatic]
nvidia-utils-390/impish,now 390.144-0ubuntu2 amd64 [installed,automatic]
xserver-xorg-video-nvidia-390/impish,now 390.144-0ubuntu2 amd64 [installed,automatic]

[    56.793] (**) OutputClass "nvidia" ModulePath extended to "/usr/lib/x86_64-linux-gnu/nvidia/xorg,/usr/lib/xorg/modules"
[    56.890] (II) Loading /usr/lib/x86_64-linux-gnu/nvidia/xorg/libglx.so
[    64.364] (II) Applying OutputClass "nvidia" to /dev/dri/card1
[    64.364]    loading driver: nvidia
[    64.492] (==) Matched nvidia as autoconfigured driver 0
[    64.492] (II) LoadModule: "nvidia"
[    64.492] (II) Loading /usr/lib/x86_64-linux-gnu/nvidia/xorg/nvidia_drv.so
[    65.542] (II) Module nvidia: vendor="NVIDIA Corporation"```

```nvidia-smi 
Fri Jan 21 10:37:03 2022       
+---------------------------------------------+
| NVIDIA-SMI 390.144                Driver Version: 390.144                   |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|===============================+======================+======================|
|   0  GeForce GT 720M     Off  | 00000000:01:00.0 N/A |                  N/A |
| N/A   46C    P0    N/A /  N/A |      0MiB /  1985MiB |     N/A      Default |
+-------------------------------+----------------------+----------------------+
                                                                               
+---------------------------------------------+
| Processes:                                                       GPU Memory |
|  GPU       PID   Type   Process name                             Usage      |
|=============================================================================|
|    0                    Not Supported                                       |
+---------------------------------------------+```

```glxinfo | grep render
Error: couldn't find RGB GLX visual or fbconfig
vb@vb-X550CC:~$  lspci -k | grep -iA3 vga
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
    Subsystem: ASUSTeK Computer Inc. 3rd Gen Core processor Graphics Controller
    Kernel driver in use: i915
    Kernel modules: i915```

```dmesg |grep nvidia
[   21.117008] nvidia: loading out-of-tree module taints kernel.
[   21.117024] nvidia: module license 'NVIDIA' taints kernel.
[   21.123957] nvidia: module verification failed: signature and/or required key missing - tainting kernel
[   21.142417] nvidia-nvlink: Nvlink Core is being initialized, major device number 235
[   21.786042] nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for UNIX platforms  390.144  Wed Jun  2 22:58:46 UTC 2021
[   21.885293] [drm] [nvidia-drm] [GPU ID 0x00000100] Loading driver
[   21.885299] [drm] Initialized nvidia-drm 0.0.0 20160202 for 0000:01:00.0 on minor 1
[   42.807357] audit: type=1400 audit(1642759463.335:3): apparmor="STATUS" operation="profile_load" profile="unconfined" name="nvidia_modprobe" pid=696 comm="apparmor_parser"
[   42.807368] audit: type=1400 audit(1642759463.335:4): apparmor="STATUS" operation="profile_load" profile="unconfined" name="nvidia_modprobe//kmod" pid=696 comm="apparmor_parser"```

```lsmod |grep 915
nf_nat                 49152  2 nft_chain_nat,xt_MASQUERADE
nf_conntrack_netlink    49152  0
i915                 2428928  9
i2c_algo_bit           16384  1 i915
drm_kms_helper        262144  2 nvidia_drm,i915
cec                    53248  2 drm_kms_helper,i915
drm                   561152  8 drm_kms_helper,nvidia_drm,i915
x_tables               49152  5 xt_conntrack,nft_compat,xt_addrtype,ip_tables,xt_MASQUERADE
video                  53248  2 asus_wmi,i915
root@vb-X550CC:/home/vb# lsmod |grep nv
nvidia_drm             45056  0
nvidia_modeset       1056768  1 nvidia_drm
nvidia              15851520  13 nvidia_modeset
drm_kms_helper        262144  2 nvidia_drm,i915
ipmi_msghandler       114688  2 ipmi_devintf,nvidia
drm                   561152  8 drm_kms_helper,nvidia_drm,i915```

 
It seems that that both intel and nvidia driver are loaded. Does anyone has a solution?
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Please [format your question](https://askubuntu.com/help/formatting) with enough [details](https://askubuntu.com/help/how-to-ask) so that one can find an adequate answer.
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