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Maximum resolution not being detected (Linux driver i915 and Intel Iris Plus Graphics G1)

Hi all,

My Lenovo S145 with a Intel Iris Plus Graphics G1 GPU is not detecting the maximum resolution (2560x1080) of an LG Ultrawide monitor 29WK500/50S in a Gnome/Wayland session, but works in a X11 (I can manually add and set with xrandr).

Strangely, the same SO/Gnome/Wayland/Kernel Driver and Monitor fully works even in Gnome/Wayland, when only the GPU is changed (even same driver). Maybe a driver issue with a particular hardware?

- **I'd like to ask for help to correctly fix the resolution in a wayland session (only in X11 with xrandr)**
- **and to track down the issue (for learning purposes).**


I am posting here because the exact same software stack (SO/Gnome/Wayland/driver) and monitor works fine when the GPU is a Intel HD Graphics 520] [8086:1916]. It seems a particularity of this GPU hw.

How reproducible:
May be specific to my hardware (Lenovo Ideapad S145 / Intel Iris Plus Graphics G1).
Not related to monitor or HDMI cable (works fine in a gnome X11 session)

Steps to Reproduce:
1. Start gnome wayland session
2. Start control-center, display settings
3. Only presented resolution choice is maximum resolution of 1920x1080

Expected results:
Existing entry of 2560x1080@60 resolution and possibility to change.

Graphics adapter:
Intel Corporation Iris Plus Graphics G1 (Ice Lake) [8086:8a56] (rev 07)
Intel Core i5-1035G1
(desired resolution is supported by GPU / HDMI output -
00:02.0 VGA compatible controller [0300]: Intel Corporation Iris Plus Graphics G1 (Ice Lake) [8086:8a56] (rev 07)
Subsystem: Lenovo Device [17aa:3fdc]
Kernel driver in use: i915
Kernel modules: i915

Fedora 32 - 5.8.10-200.fc32.x86_64, up to date

Lenovo Ideapad S145

Monitor: LG Ultrawide 29WK500/50S (max res: 2560x1080)
Decoded edid reports the desired resolution:
DTD 4: 2560x1080 74.991 Hz 64:27 83.915 kHz 228.250 MHz (798 mm x 334 mm)
Hfront 48 Hsync 32 Hback 80 Hpol P
Vfront 3 Vsync 10 Vback 26 Vpol N

Full logs:


Strangely, the same OS, monitor, cable, gnome/wayland and even kernel driver works fine. When connected to another noteboot the 2560x1080 resolution is detected just fine by gnome/wayland.
00:02.0 VGA compatible controller [0300]: Intel Corporation Skylake GT2 [HD Graphics 520] [8086:1916] (rev 07)
Subsystem: Acer Incorporated [ALI] Device [1025:100c]
Kernel driver in use: i915
Kernel modules: i915

- EDID reading was exact the same in both notebooks (one works just fine).

Solutions already tried:
Boot parameters in grub (individually):
nomodeset i915.modeset=0

Multiple xrandr solutions, adding modes, etc -- which are supposedly no to work anyway, since xrandr can't control wayland (?).
When logging in gnome using a X11 session I can manually add the mode and set it using xrandr (but the goal is to fix the wayland session).

- Issue also exist in newer Fedora 33 with gnome 3.38.

Possibly related issues:

- Any other hardware than the GPU, HDMI cable or monitor could have any influence?
ie. some motherboard controller, BIOS/UEFI, etc... that could impact the correct detection?

Thank you in advance for any help,



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3 Replies

Hello mbn12, 


Thank you for posting on the Intel® communities.   


I would like to let you know that Intel® does not provide direct downloads and technical support for Linux drivers. The Intel Graphics Linux driver is primarily supported through the original equipment manufacturer (OEM), or the Linux* distribution vendor.  You might also want to visit the Intel Open Source Technology Center at Have you tried checking this website?  


You might also want to check with Lenovo* to see whether they have any information regarding Linux compatibility with this specific information.  


For more information, see the Drivers for Linux document for more details. 




Sebastian M  

Intel Customer Support Technician  


Hello mbn12, 


Were you able to check the previous post and follow our recommendations? Please let me know if you need more assistance.   

Additionally, I will highly recommend you to contact your OS Vendor for peer assistance on this:



Sebastian M 

Intel Customer Support Technician  


Hello mbn12,  


We have not heard back from you, so we will close this inquiry. Please remember to check with your OEM, the Linux* distribution vendor, or visit the Intel Open Source Technology Center for further assistance. 

If you have additional questions, please create a new thread and we will gladly assist you.  




Sebastian M  

Intel Customer Support Technician