# Troubleshoot display issues

Diagnose display problems by checking embedded DisplayPort (eDP) configuration and connectivity. Inspect Extended Display Identification Data (EDID) and debug information so you can identify issues across the display hardware and software stack.

## Debug eDP

**View the eDP information**

- To check the selected eDP information, run the following command:

cat /sys/kernel/debug/dri/0/eDP-1/dp_debug
        Copy to clipboard

    **Sample output**

name = msm_dp
        drm_dp_link
                rate = 270000
                num_lanes = 4
                capabilities = 1
        dp_panel_info:
                active = 3840x2160
                back_porch = 80x23
                front_porch = 48x3
                sync_width = 32x5
                active_low = 0x0
                h_skew = 0
                refresh rate = 30
                pixel clock khz = 262750
                bpp = 30
        dp_link:
                test_requested = 512
                num_lanes = 4
                bw_code = 10
                lclk = 270000000
                v_level = 1
                p_level = 0
        Copy to clipboard

**View status of eDP connection**

- To verify the eDP connection, run the following command:

cat /sys/class/drm/card0-eDP-1/status
        Copy to clipboard

    **Sample output**

Connected
        Copy to clipboard

**Check the EDID modes of eDP**

- To check the EDID modes for the connected eDP, run the following command:

cat /sys/class/drm/card0-eDP-1/modes
        Copy to clipboard

    **Sample output**

3840x2160
        2048x1080
        1920x1080
        1280x720
        Copy to clipboard

Last Published: Sep 27, 2026

[Previous Topic
Display specifications](https://docs.qualcomm.com/bundle/publicresource/80-A0399-83/topics/display_specifications.md) [Next Topic
References](https://docs.qualcomm.com/bundle/publicresource/80-A0399-83/topics/references.md)