I've noticed through multiple bug reports that recent kernels have become pedantic about bandwidth requirements and therefore which resolutions they are willing to offer.
Also 5120x1440 at 60Hz is right near the limit of what the i7-8565U can do: https://ark.intel.com/content/www/us/en/ark/products/149091/intel- core-i7-8565u-processor-8m-cache-up-to-4-60-ghz.html#tab-blade-1-0-4 Still, if it worked before then you probably just need either: * A higher grade USB-C (or better yet Thunderbolt) cable that will work on more kernel versions; or * To try various older and newer kernel versions to see which are willing to offer the full resolution. ** No longer affects: mutter (Ubuntu) ** Summary changed: - Dell Ultrasharp 4919DW + [i915] Dell Ultrasharp 4919DW only achieves half of native resolution ** Tags added: regression-update -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in 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 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
