Hi Bryan. Can you file new bug: https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs Br, Jani Saarinen Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo > -----Original Message----- > From: Intel-gfx <intel-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Bryan > O'Sullivan > Sent: sunnuntai 14. marraskuuta 2021 6.36 > To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx > Subject: Can't drive 4K monitor at full resolution over DP > > I have a new Framework laptop running Fedora 35, stock kernel package 5.14.16- > 301, BDB version 240. > > My CPU/GPU is an 11th gen i7-1165G7, connected via a USB-C-to-DP cable to a > 2014-era Dell P2715Q monitor that supports 3840x2160@60Hz over DP (my Mac > drives it this way just fine). > > With i915 debugging enabled, I can see the 4K modeline being detected and > discarded because CLOCK_HIGH. Here's some debug output in a paste as it's longish > and verbose: https://pastebin.com/reGcmxYF > > Line 17 of that paste seems weird, where the value of everything is zero for some > reason? > > Here's some output from the monitor-edid tool. If there's any more information I > can supply to track this down, I'm happy to do what I can. > > Name: DELL P2715Q > EISA ID: DEL40bd > EDID version: 1.4 > EDID extension blocks: 1 > Screen size: 59.7 cm x 33.6 cm (26.97 inches, aspect ratio 16/9 = 1.78) > Gamma: 2.2 > Digital signal > Max video bandwidth: 540 MHz > > HorizSync 31-140 > VertRefresh 29-75 > > # Monitor preferred modeline (60.0 Hz vsync, 133.3 kHz hsync, ratio 16/9, 163 > dpi) > ModeLine "3840x2160" 533.25 3840 3888 3920 4000 2160 2163 2168 2222 - > hsync +vsync > > # Monitor supported CEA modeline (60.0 Hz vsync, 67.5 kHz hsync, ratio 16/9, > 81 dpi) > ModeLine "1920x1080" 148.5 1920 2008 2052 2200 1080 1084 1089 1125 > +hsync +vsync
