# Troubleshoot camera

If the camera app doesn’t work, check the following:

1. Check the camera module connection and DIP switch settings. See [Getting started](https://docs.qualcomm.com/doc/80-80020-17/topic/stream-cameras.html#getting-started).
2. Restart the cam-server:

# systemctl restart cam-server
        
        or:
        
        # pkill cam-server
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3. Run a single stream video recording use case:

# mount -o rw,remount /usr
        
        gst-launch-1.0 -e qtiqmmfsrc name=camsrc camera=0 ! \
        video/x-raw,format=NV12,width=1280,height=720,framerate=30/1,\
        interlace-mode=progressive,colorimetry=bt601 ! v4l2h264enc \
        capture-io-mode=4 output-io-mode=5 extra-controls="controls,video_bitrate=6000000,\
        video_bitrate_mode=0;" ! h264parse ! mp4mux ! filesink location=/opt/mux_avc.mp4
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4. Check the sensor probe.

    1. Collect logs using following command:

# journalctl -f > /opt/log.txt
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    2. Search for “probe success” in the log. Probe success means the camera module is powered up and responding to I2C control. If there is no ‘probe success’ log for a particular sensor, the flex cable connection or camera module may be the problem.

        The following log indicates one IMX577 (0x34), one OV9282 (0xc0), and two GMSL deserializer (0x90) are probed:

CAM_INFO: CAM-SENSOR:cam_sensor_driver_cmd: 938: Probe success,slot:0,slave_addr: 0x34,sensor_id:0x577, is always on:0
            CAM_INFO: CAM-SENSOR:cam_sensor_driver_cmd: 938: Probe success,slot:1,slave_addr: 0xc0,sensor_id:0x9281, is always on:0
            CAM_INFO: CAM-SENSOR:cam_sensor_driver_cmd: 938: Probe success,slot:4,slave_addr: 0x90,sensor_id:0x94, is always on:0
            CAM_INFO: CAM-SENSOR:cam_sensor_driver_cmd: 938: Probe success,slot:5,slave_addr: 0x90,sensor_id:0x94, is always on:0
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5. Check the camera sensor driver command.

    Collect logs and search for `cam_sensor_driver_cmd`. `CAM_START_DEV Success` indicates camera sensor streaming starts. `CAM_STOP_DEV Success` indicates camera sensor streaming stops. For example:

CAM_INFO: CAM-SENSOR:cam_sensor_driver_cmd: 1017: CAM_ACQUIRE_DEV Success, sensor_id: 0x577,sensor_slave_addr:0x34
        CAM_INFO: CAM-SENSOR:cam_sensor_driver_cmd: 1128: CAM_START_DEV Success, sensor_id: 0x577,sensor_slave_addr:0x34
        CAM_INFO: CAM-SENSOR:cam_sensor_driver_cmd: 1156: CAM_STOP_DEV Success, sensor_id:0x577,sensor_slave_addr:0x34
        CAM_INFO: CAM-SENSOR:cam_sensor_driver_cmd: 1070: CAM_RELEASE_DEV Success, sensor_id: 0x577,sensor_slave_addr:0x34
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6. Check sensor streaming.

    To enable CSID IRQ logs dynamically, use the appropriate mask value(s) with the following command.

    - QCS6490

> 
> 
> # mount -o rw,remount /usr
>             # mount -t debugfs none /sys/kernel/debug/
>             # echo MASKVALUE > /sys/kernel/debug/camera_ife/ife_csid_debug
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    - QCS9075/QCS8275

> 
> 
> # mount -o rw,remount /usr
>             # mount -t debugfs none /sys/kernel/debug/
>             # echo MASKVALUE > /sys/kernel/debug/camera/ife/ife_csid_debug
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    The following table lists the CSID debug groups.

    | CSID debug group | Value | Description |
    | --- | --- | --- |
    | CSID\_DEBUG\_ENABLE\_SOF\_IRQ | (1<< 0) | Start of frame |
    | CSID\_DEBUG\_ENABLE\_EOF\_IRQ | (1<< 1) | End of frame |
    | CSID\_DEBUG\_ENABLE\_SOT\_IRQ | (1<< 2) | Start of transmission |
    | CSID\_DEBUG\_ENABLE\_EOT\_IRQ | (1<< 3) | End of transmission |
    | CSID\_DEBUG\_ENABLE\_SHORT\_PKT\_CAPTURE | (1<< 4) | Short packet capture |
    | CSID\_DEBUG\_ENABLE\_LONG\_PKT\_CAPTURE | (1<< 5) | Long packet capture |
    | CSID\_DEBUG\_ENABLE\_CPHY\_PKT\_CAPTURE | (1<< 6) | CPHY packet capture |

    For example:

    - To enable SOF, EOF, SOT, and EOT IRQs:

> 
> 
> # echo 0xf > /sys/kernel/debug/camera/ife/ife_csid_debug
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    - To set only short packet and long packet capture IRQs:

> 
> 
> # echo 0x30 > /sys/kernel/debug/camera/ife/ife_csid_debug
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    The captured logs can help provide the details about the SOF and EOF and indicate which sensor is streaming. The following is an example log:

> 
> 
> CAM_INFO: CAM-ISP: cam_ife_csid_irq: 5288 CSID:1 IPP SOF received
>         CAM_INFO: CAM-ISP: cam_ife_csid_irq: 5300 CSID:1 IPP EOF received
>         CAM_INFO: CAM-ISP: cam_ife_csid_irq: 5288 CSID:1 IPP SOF received
>         CAM_INFO: CAM-ISP: cam_ife_csid_irq: 5300 CSID:1 IPP EOF received
>         CAM_INFO: CAM-ISP: cam_ife_csid_irq: 5288 CSID:1 IPP SOF received
>         CAM_INFO: CAM-ISP: cam_ife_csid_irq: 5300 CSID:1 IPP EOF received
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Last Published: Feb 27, 2026

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