<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - LG 31MU97 monitor native resolution is 4096x2160, but highest mode found is 3840x2160" href="https://bugs.freedesktop.org/show_bug.cgi?id=108081#c22">Comment # 22</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - LG 31MU97 monitor native resolution is 4096x2160, but highest mode found is 3840x2160" href="https://bugs.freedesktop.org/show_bug.cgi?id=108081">bug 108081</a> from <a class="email" href="mailto:brainn@gmail.com" title="Brian Vincent <brainn@gmail.com>"> Brian Vincent</a> <pre>Created <a href="attachment.cgi?id=141863" name="attach_141863" title="dmesg drm-tip amdgpu machine drm.debug=0x1e">attachment 141863</a> <a href="attachment.cgi?id=141863&action=edit" title="dmesg drm-tip amdgpu machine drm.debug=0x1e">[details]</a> dmesg drm-tip amdgpu machine drm.debug=0x1e I'm attaching dmesg with drm-tip on the amdgpu machine with drm.debug=0x1e So this amdgpu machine is a desktop, with the monitor directly plugged into the video card with a full sized displayport cable. More information on the problematic i915 laptop setup: It's a Dell XPS 15 9560. It's connected to a TB16 thunderbolt docking station. Over the weekend, I updated the firmware on the laptop itself, the dock, the cable, everything. I had to create a windows USB drive to update the firmware. I've noticed no difference in behavior after the firmware upgrades. I get the same EDID. Two of the firmwares that I updated were: Synaptics VM3320 inside Dell WD15/TB16 wired dock Summary: Multi-Stream Transport Device Synaptics VM3330 inside Dell WD15/TB16 wired dock Summary: Multi-Stream Transport Device So I think it makes sense that you would see MST stuff for this laptop setup, but you wouldn't see it on the amdgpu machine. I also want to say that when I was booted up with Windows, it initially didn't find the mode 4096x2160, but eventually after Windows did a bunch of hardware discovery stuff, it was available. I still have that USB drive if you would like me to look at something in a Windows environment on the problematic i915 laptop/dock setup.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>