On Fri, Feb 28, 2020 at 11:06 AM Felix Miata <mrmazda@xxxxxxxxxxxxx> wrote: > Video and input drivers Subgroups and projects on gitlab does not list modesetting > DDX, presumably because it's not packaged separately from the server. Where's the > right place to report a modesetting DDX bug that manifests only on an NVidia GPU? > Directly against the server https://gitlab.freedesktop.org/xorg/xserver? I don't know if anyone (from nouveau) looks at gitlab, so mailing list is probably best anyways. > > Here are some particulars: > How can I tell whether this should be reported to kernel tracker or to freedesktop > tracker as driver or server problem? HDMI output on GT218 10de:0a65 GPU is limited > to 1920x1200. When connected to 2560x1440 display, vttys are supported at > display's supported 1920x1080 mode, but X with modesetting DDX puts display in > unsupported mode (functionally asleep) regardless of various attempts to force > 1920x1080@60 or 1600x900@60, while with nouveau DDX, or 1920x1200 display, or > 2560x1440 display with Dual-link DVI cable, display behavior is as expected. > > openSUSE 15.1/kernel 4.12.14 OK > openSUSE 15.2/kernel 5.3.18 bad > Tumbleweed/kernel 5.4.14 bad > Debian Buster/kernel 4.19.x OK > Fedora 31/5.5.5 kernel bad > > http://fm.no-ip.com/Tmp/Linux/Xorg/xorg.0.log-gt218-stw-modesetting-OOR-0x1e > http://fm.no-ip.com/Tmp/Linux/Xorg/gt218-dmesg-stw.txt Those HDMI mode clocks are too high against the nominal single-link 165MHz TMDS. You can set your own maximum with nouveau.hdmimhz=300 (for example) to allow it. I believe the connectors aren't rated for that though. The commit which fixed this is commit d1084184789d677df4e9c110f38cb3f3d709195d Author: Ben Skeggs <bskeggs@xxxxxxxxxx> Date: Wed May 29 09:58:18 2019 +1000 drm/nouveau/kms: disallow dual-link harder if hdmi connection detected and went into v5.3. I'm not sure where this got broken... I think it would have been commit 9340d77f5327ea673a7f95f58139123d7a278243 Author: Ilia Mirkin <imirkin@xxxxxxxxxxxx> Date: Mon Sep 3 20:57:37 2018 -0400 drm/nouveau/disp: take sink support into account for exposing 594mhz which went into v4.20, but it could also have been commit 1a0c96c075bb4517d4ce4fb6750ee0a3cf38714c Author: Ilia Mirkin <imirkin@xxxxxxxxxxxx> Date: Tue Nov 3 21:00:11 2015 -0500 drm/nouveau/kms: allow 225/297MHz pixel clocks for HDMI on Fermi/Kepler which went into v4.5 and lines up with your timeline better, but seems like it shouldn't be handing out those high frequencies to HDMI connectors on tesla... Cheers, -ilia _______________________________________________ Nouveau mailing list Nouveau@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/nouveau
