Currently kscreen-doctor outputs pretty terse information about display modes. For example in kscren-doctor -o Output: 87 DisplayPort-2 enabled connected primary DisplayPort Modes: 90:2560x1440@165! 91:2560x1440@144 92:2560x1440@180* ... Scale: 1 Rotation: 1 Overscan: 0 Vrr: incapable RgbRange: unknown primary It would be nice to be able to get more information in particular detailed modeline info like pixel clock, vertical and horizontal sync pulses and backporches and sync polarities. For example how it's shown in xrandr --verbose: 2560x1440 (0x5c) 768.500MHz +HSync -VSync *current h: width 2560 start 2608 end 2640 total 2720 skew 0 clock 282.54KHz v: height 1440 start 1443 end 1448 total 1570 clock 179.96Hz This in particular can be useful for the Wayland session where xrandr isn't really properly applicable.
I am not sure we will implement this, as there are others tools already filling this usecase. I am thinking about drm_info in particular : https://github.com/ascent12/drm_info
(In reply to Méven Car from comment #1) > I am not sure we will implement this, as there are others tools already > filling this usecase. > > I am thinking about drm_info in particular : > https://github.com/ascent12/drm_info May be I'm missing something, but how can I see the above details (like sync pulse and backporches especially) in drm_info? I can see something like this: e: /dev/dri/card0 ├───Driver: amdgpu (AMD GPU) version 3.42.0 (20150101) │ ├───DRM_CLIENT_CAP_STEREO_3D supported │ ├───DRM_CLIENT_CAP_UNIVERSAL_PLANES supported │ ├───DRM_CLIENT_CAP_ATOMIC supported │ ├───DRM_CLIENT_CAP_ASPECT_RATIO supported │ ├───DRM_CLIENT_CAP_WRITEBACK_CONNECTORS supported │ ├───DRM_CAP_DUMB_BUFFER = 1 │ ├───DRM_CAP_VBLANK_HIGH_CRTC = 1 │ ├───DRM_CAP_DUMB_PREFERRED_DEPTH = 24 │ ├───DRM_CAP_DUMB_PREFER_SHADOW = 1 │ ├───DRM_CAP_PRIME = 3 │ ├───DRM_CAP_TIMESTAMP_MONOTONIC = 1 │ ├───DRM_CAP_ASYNC_PAGE_FLIP = 1 │ ├───DRM_CAP_CURSOR_WIDTH = 256 │ ├───DRM_CAP_CURSOR_HEIGHT = 256 │ ├───DRM_CAP_ADDFB2_MODIFIERS = 1 │ ├───DRM_CAP_PAGE_FLIP_TARGET = 0 │ ├───DRM_CAP_CRTC_IN_VBLANK_EVENT = 1 │ ├───DRM_CAP_SYNCOBJ = 1 │ └───DRM_CAP_SYNCOBJ_TIMELINE = 1 ├───Device: PCI 1002:73bf ├───Framebuffer size │ ├───Width: [0, 16384] │ └───Height: [0, 16384] ├───Connectors ... │ ├───Connector 2 │ │ ├───Object ID: 105 │ │ ├───Type: DisplayPort │ │ ├───Status: connected │ │ ├───Physical size: 700x390 mm │ │ ├───Subpixel: unknown │ │ ├───Encoders: {2} │ │ ├───Modes │ │ │ ├───2560x1440@164.96 preferred driver phsync nvsync │ │ │ ├───2560x1440@143.97 preferred driver phsync nvsync │ │ │ ├───2560x1440@179.96 driver phsync nvsync ... │ │ └───Properties │ │ ├───"EDID" (immutable): blob = 135 │ │ ├───"DPMS": enum {On, Standby, Suspend, Off} = On │ │ ├───"link-status": enum {Good, Bad} = Good │ │ ├───"non-desktop" (immutable): range [0, 1] = 0 │ │ ├───"TILE" (immutable): blob = 0 │ │ ├───"CRTC_ID" (atomic): object CRTC = 77 │ │ ├───"scaling mode": enum {None, Full, Center, Full aspect} = None │ │ ├───"underscan": enum {off, on, auto} = off │ │ ├───"underscan hborder": range [0, 128] = 0 │ │ ├───"underscan vborder": range [0, 128] = 0 │ │ ├───"max bpc": range [8, 16] = 8 │ │ ├───"HDR_OUTPUT_METADATA": blob = 0 │ │ ├───"vrr_capable" (immutable): range [0, 1] = 1 │ │ ├───"Content Protection": enum {Undesired, Desired, Enabled} = Undesired │ │ ├───"HDCP Content Type": enum {HDCP Type0, HDCP Type1} = HDCP Type0 │ │ └───"subconnector" (immutable): enum {Unknown, VGA, DVI-D, HDMI, DP, Wireless, Native} = Native ... ├───CRTCs │ ├───CRTC 0 │ │ ├───Object ID: 77 │ │ ├───Mode: 2560x1440@179.96 phsync nvsync │ │ └───Properties │ │ ├───"ACTIVE" (atomic): range [0, 1] = 1 │ │ ├───"MODE_ID" (atomic): blob = 120 │ │ │ └───2560x1440@179.96 phsync nvsync │ │ ├───"OUT_FENCE_PTR" (atomic): range [0, UINT64_MAX] = 0 │ │ ├───"VRR_ENABLED": range [0, 1] = 0 │ │ ├───"DEGAMMA_LUT": blob = 0 │ │ ├───"DEGAMMA_LUT_SIZE" (immutable): range [0, UINT32_MAX] = 4096 │ │ ├───"CTM": blob = 121 │ │ ├───"GAMMA_LUT": blob = 133 │ │ └───"GAMMA_LUT_SIZE" (immutable): range [0, UINT32_MAX] = 4096 ... └───Planes ...
drm_info -j Quoting the README in https://github.com/ascent12/drm_info `-j - Output info in JSON. Otherwise the output is pretty-printed.`
(In reply to Méven Car from comment #3) > drm_info -j > > Quoting the README in https://github.com/ascent12/drm_info > `-j - Output info in JSON. Otherwise the output is pretty-printed.` I see it now, thanks for the pointer!
I can see modes listed for sure, but how can I figure out from that JSON which mode is active now?
(In reply to Shmerl from comment #5) > I can see modes listed for sure, but how can I figure out from that JSON > which mode is active now? In CRTCS you have a "MODE_ID" field.