HDMI Monitor works in Windows, but not Ubuntu 22.04

AG6HQ

11/6/23, 10:05 PM

I have a Lenovo Ideapad 5i with Intel iRISxe graphics with dual boot to Windows 10 and Ubuntu 22.04. When I boot to Windows, I can use my external monitor, which is connected via HDMI. (no docking station). But when I boot to Ubuntu, I get this:

It bothers me that my laptop's display is Unknown. xrandr returns an error:

# xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 2560 x 1600, current 2560 x 1600, maximum 2560 x 1600
default connected primary 2560x1600+0+0 0mm x 0mm
   2560x1600     93.00*

Further, a search of the lshw output does not find any reference to HDMI. (it does find VGA) in ideapad-core-pci:

       *-display UNCLAIMED
             description: VGA compatible controller
             product: TigerLake-LP GT2 [Iris Xe Graphics]
             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:601c000000-601cffffff memory:4000000000-400fffffff ioport:3000(size=64) memory:c0000-dffff memory:4010000000-4016ffffff memory:4020000000-40ffffffff

and in ideapad:

  *-graphics
       product: EFI VGA
       physical id: 3
       logical name: /dev/fb0
       capabilities: fb
       configuration: depth=32 resolution=2560,1600

Any ideas?

284

0 + 1

multiple-monitors

lenovo

hdmi

intel

Nmath

11/6/23, 10:33 PM

I wouldn't worry about the "unknown", especially since this is for the display that's working. Do you have an Ubuntu USB? It may be helpful from a diagnostic standpoint to boot a live session from USB to see if it works on a "clean" system.

Elon Musk

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EN: HDMI Monitor works in Windows, but not Ubuntu 22.04

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