https://bugzilla.suse.com/show_bug.cgi?id=1234055 Bug ID: 1234055 Summary: Unable to reach dual monitor resolution with 2x 4k UHD side by side to 7680x2160 Classification: openSUSE Product: openSUSE Distribution Version: Leap 15.6 Hardware: x86-64 OS: openSUSE Leap 15.5 Status: NEW Severity: Normal Priority: P5 - None Component: Kernel Assignee: kernel-bugs@opensuse.org Reporter: otrebor@hispeed.ch QA Contact: qa-bugs@suse.de Target Milestone: --- Found By: --- Blocker: --- Created attachment 878829 --> https://bugzilla.suse.com/attachment.cgi?id=878829&action=edit xrandr log Hi I have a recently bought Lenovo X1 Carbon Gen 12 with an Intel Core Ultra 7 Processor 165U and 64Gig Memory. This Notebook is attached to a Lenovo ThinkPad Universal Thunderbolt 4 Smart Dock via a TB4 cable. Plugged into the dock there are two EIZO FlexScan EV2740X Displays. Both attached via DisplayPort. The NB runs OpenSuse Leap 15.6 all patches applied. Also all available firmware updates have been installed via fwupdmgr. The problem is, that this setup does not run with both EIZO displays set to 4k UHD resolution side-by-side. (in 7680x2160 resolution setup). This fails with or without having the internal NB display active or not. Another NB running Win11 with an Nvidia Graphics card attached to the same dock runs both display just fine at 4k UHD resolution. So, i guess the problem lies with the Lenovo X1 Carbon and its Intel i915 graphics driver. According to the intel specs here this should work: https://www.intel.com/content/www/us/en/products/sku/237329/intel-core-ultra... The setup runs fine when i set the resolution on both EIZOS to the lower 2560x1440 and arrange them side by side. I'm a bit puzzled, as is this limited by design or is there something wrong with the drivers. In single display config both displays run fine at 4k UHD (3840x2160) mode. I have attached a number of log files. If you wouldn't mind helping me on this, I'd be grateful. I'm no hardware or kernel geek. Thanks -- You are receiving this mail because: You are on the CC list for the bug.