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? If so, why the X11 works, since the EDID reading is the same?
- 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).
Maybe it is a driver/hardware issue, but I am posting here since the Lenovo Ideapad or Intel Iris GPU is widely used, it may impact the experience of multiple users trying Fedora.
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:
- Start gnome wayland session
- Start control-center, display settings
- Only presented resolution choice is maximum resolution of 1920x1080
Existing entry of 2560x1080@60 resolution and possibility to change.
Intel Corporation Iris Plus Graphics G1 (Ice Lake) [8086:8a56] (rev 07)
Intel Core i5-1035G1
(desired resolution is supported by GPU / HDMI output - Intel Core i51035G1 Processor 6M Cache up to 3.60 GHz Product Specifications)
00:02.0 VGA compatible controller : 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
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 : 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):
video=XWAYLAND1:2560x1080@60 video=HDMI-1:2560x1080@60 i915.enable_guc=-1 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,