Thanks, Jani, here's the bug report: https://gitlab.freedesktop.org/drm/intel/-/issues/4531
On Sun, Nov 14, 2021 at 2:50 AM Saarinen, Jani <[email protected]> wrote: > 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 <[email protected]> On Behalf Of > Bryan > > O'Sullivan > > Sent: sunnuntai 14. marraskuuta 2021 6.36 > > To: [email protected] > > Subject: [Intel-gfx] 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 > >
