I set up a dual-booted Ubuntu 20.04 for Asus ZenBook UX393EA, which has an integrated graphics card 'Intel(R) Iris(R) Xe Graphics'. However I find llvmpipe (LLVM 11.0.0, 256 bits) is used but not the integrated graphics card.

I believe some other issues are due to this, such as:

• xrandr failed to get size of gamma for output default


• the screen resolution can only be set to one value


• no control bar for screen brightness

Here are some info:

• linux kernel

➜  ~ uname -r 

5.4.0-56-generic

• lspci

➜  ~ lspci -nnk | grep -iA2 VGA   

0000:00:02.0 VGA compatible controller [0300]: Intel Corporation Device [8086:9a49] (rev 01)

    DeviceName: VGA

    Subsystem: ASUSTeK Computer Inc. Device [1043:13e2]

    Kernel modules: i915

• inxi

(as you can see, the driver for Intel graphics is not loaded)

➜  ~ inxi -G  

Graphics:  Device-1: Intel driver: N/A 

           Device-2: IMC Networks USB2.0 HD IR UVC WebCam type: USB driver: uvcvideo 

           Display: x11 server: X.Org 1.20.8 driver: fbdev unloaded: modesetting resolution: 3300x2200~90Hz 

           OpenGL: renderer: llvmpipe (LLVM 11.0.0 256 bits) v: 4.5 Mesa 21.0.0-devel (git-3f0da80 2020-12-10 focal-oibaf-ppa)

• glxinfo

➜  ~ glxinfo -B

name of display: :1

display: :1  screen: 0

direct rendering: Yes

Extended renderer info (GLX_MESA_query_renderer):

    Vendor: Mesa/X.org (0xffffffff)

    Device: llvmpipe (LLVM 11.0.0, 256 bits) (0xffffffff)

    Version: 21.0.0

    Accelerated: no

    Video memory: 15694MB

    Unified memory: no

    Preferred profile: core (0x1)

    Max core profile version: 4.5

    Max compat profile version: 3.1

    Max GLES1 profile version: 1.1

    Max GLES[23] profile version: 3.2

OpenGL vendor string: Mesa/X.org

OpenGL renderer string: llvmpipe (LLVM 11.0.0, 256 bits)

OpenGL core profile version string: 4.5 (Core Profile) Mesa 21.0.0-devel (git-3f0da80 2020-12-10 focal-oibaf-ppa)

OpenGL core profile shading language version string: 4.50

OpenGL core profile context flags: (none)

OpenGL core profile profile mask: core profile



OpenGL version string: 3.1 Mesa 21.0.0-devel (git-3f0da80 2020-12-10 focal-oibaf-ppa)

OpenGL shading language version string: 1.40

OpenGL context flags: (none)



OpenGL ES profile version string: OpenGL ES 3.2 Mesa 21.0.0-devel (git-3f0da80 2020-12-10 focal-oibaf-ppa)

OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20

• lshw

➜  ~ sudo lshw -c video

  *-display UNCLAIMED       

       description: VGA compatible controller

       product: Intel Corporation

       vendor: Intel Corporation

       physical id: 2

       bus info: pci@0000:00:02.0

       version: 01

       width: 64 bits

       clock: 33MHz

       capabilities: pciexpress msi pm vga_controller bus_master cap_list

       configuration: latency=0

       resources: iomemory:600-5ff iomemory:400-3ff memory:603e000000-603effffff memory:4000000000-400fffffff ioport:3000(size=64) memory:c0000-dffff memory:4010000000-4016ffffff memory:4020000000-40ffffffff

• dmesg

➜  ~ dmesg | grep drm 

[    1.420124] systemd[1]: Starting Load Kernel Module drm...

[    1.428692] systemd[1]: [email protected]: Succeeded.

[    1.428949] systemd[1]: Finished Load Kernel Module drm.

[    1.667732] [drm] Your graphics device 9a49 is not properly supported by the driver in this

where the last one log is:

[drm] Your graphics device 9a49 is not properly supported by the driver in this

kernel version. To force driver probe anyway, use i915.force_probe=9a49

module parameter or CONFIG_DRM_I915_FORCE_PROBE=9a49 configuration option,

or (recommended) check for kernel updates.

there's another log concerning i915, I'm not sure if it's related:

snd_hda_codec_hdmi hdaudioC0D2: No i915 binding for Intel HDMI/DP codec

I guess the root cause is that the graphics card is not supported by the current driver i915. I don't know what to do or if there are other reasons for this issue. Here are what I have tried:

• changed /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT to "", as the way in Ubuntu 20.04 Intel HD 615: No Brightness control or no Boot / Stuck on Boot Screen


• configure xorg to prefer the Intel or disable modeswitching out of IGD, as the way in Ubuntu 18.04 not working with Intel Integrated Graphics


• remove xserver-xorg-video-fbdev, as the way in https://forums.linuxmint.com/viewtopic.php?t=287323, which only made the boot procedure stuck in splash screen.

None of them works for me. I would be grateful if someone could give any help or ideas.