Sounds like the problem is still the cable to me. Especially if Windows is reporting faulty USB.
Cables are the part most likely to be manufactured to a lower spec than you need here. It's probably not the laptop or monitor's fault. Please try to get hold of a Thunderbolt 3 or higher cable. Just running the numbers on the Dell 4919DW: 5120x1440 is 7372800 pixels at 24-bit, 3 bytes per pixel that's 22118400 bytes per frame at 60 frames per second that's 1327104000 bytes per second or about 10.6 gigabits per second. So your cable probably needs to support 20 Gbps as a minimum to drive the display, or even for the kernel to recognise there is enough bandwidth to attempt the full resolution. Thunderbolt 3 is 40 Gbps. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2077766 Title: [i915] Dell Ultrasharp 4919DW only achieves half of native resolution To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2077766/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
