Ubuntu
libcamera package

Camera not available in libcamera

Asked by Luis Melendez

Just got libcamera working on an RPi4B running Ubuntu 22.04 LTS, but "cam -l" does not list a camera available. (Confirmed the camera and hardware work with RPi OS and libcamera-hello prior to the build.)

From preliminary troubleshooting suspect it may have something to do with permissions.

Initial error codes indicate libcamera (or the OS) recognized the camera (imx477), but had problems with dmaHeap. "ERROR RPI dma_heaps.cpp:53 Could not open any dmaHeap device", and "ERROR RPI raspberrypi.cpp:1278 Failed to register camera imx477 10-001a: -12"

From reading about dmaHeap issues online I added my username to the 'video' group and no longer get those errors, but still no camera is available.

Not sure what to make of the debug output below, other than things generally look good (no errors).

Any recommendations on what else to look into?

luis@RPi4-Ubuntu:~$ LIBCAMERA_LOG_LEVELS=*:DEBUG cam -l
[0:10:29.031297600] [3202] DEBUG IPAModule ipa_module.cpp:329 ipa_rkisp1.so: IPA module /usr/local/lib/aarch64-linux-gnu/libcamera/ipa_rkisp1.so is signed
[0:10:29.031920457] [3202] DEBUG IPAManager ipa_manager.cpp:245 Loaded IPA module '/usr/local/lib/aarch64-linux-gnu/libcamera/ipa_rkisp1.so'
[0:10:29.033633179] [3202] DEBUG IPAModule ipa_module.cpp:329 ipa_rpi.so: IPA module /usr/local/lib/aarch64-linux-gnu/libcamera/ipa_rpi.so is signed
[0:10:29.034040170] [3202] DEBUG IPAManager ipa_manager.cpp:245 Loaded IPA module '/usr/local/lib/aarch64-linux-gnu/libcamera/ipa_rpi.so'
[0:10:29.034515567] [3202] INFO Camera camera_manager.cpp:299 libcamera v0.0.4+17-3f8bcc1a
[0:10:29.034992705] [3205] DEBUG Camera camera_manager.cpp:108 Starting camera manager
[0:10:29.052254924] [3205] DEBUG DeviceEnumerator device_enumerator.cpp:224 New media device "bcm2835-codec" created from /dev/media2
[0:10:29.052679674] [3205] DEBUG DeviceEnumerator device_enumerator_udev.cpp:95 Defer media device /dev/media2 due to 5 missing dependencies
[0:10:29.058059409] [3205] DEBUG DeviceEnumerator device_enumerator_udev.cpp:320 All dependencies for media device /dev/media2 found
[0:10:29.058322440] [3205] DEBUG DeviceEnumerator device_enumerator.cpp:252 Added device /dev/media2: bcm2835-codec
[0:10:29.060125198] [3205] DEBUG DeviceEnumerator device_enumerator.cpp:224 New media device "bcm2835-isp" created from /dev/media0
[0:10:29.060326675] [3205] DEBUG DeviceEnumerator device_enumerator_udev.cpp:95 Defer media device /dev/media0 due to 4 missing dependencies
[0:10:29.061321116] [3205] DEBUG DeviceEnumerator device_enumerator.cpp:224 New media device "bcm2835-isp" created from /dev/media3
[0:10:29.061479539] [3205] DEBUG DeviceEnumerator device_enumerator_udev.cpp:95 Defer media device /dev/media3 due to 4 missing dependencies
[0:10:29.065747705] [3205] DEBUG DeviceEnumerator device_enumerator_udev.cpp:320 All dependencies for media device /dev/media0 found
[0:10:29.065879906] [3205] DEBUG DeviceEnumerator device_enumerator.cpp:252 Added device /dev/media0: bcm2835-isp
[0:10:29.069546567] [3205] DEBUG DeviceEnumerator device_enumerator_udev.cpp:320 All dependencies for media device /dev/media3 found
[0:10:29.069689675] [3205] DEBUG DeviceEnumerator device_enumerator.cpp:252 Added device /dev/media3: bcm2835-isp
[0:10:29.070569564] [3205] DEBUG DeviceEnumerator device_enumerator.cpp:224 New media device "unicam" created from /dev/media1
[0:10:29.071008221] [3205] DEBUG DeviceEnumerator device_enumerator.cpp:252 Added device /dev/media1: unicam
[0:10:29.072645574] [3205] DEBUG Camera camera_manager.cpp:151 Found registered pipeline handler 'PipelineHandlerISI'
[0:10:29.073274987] [3205] DEBUG Camera camera_manager.cpp:151 Found registered pipeline handler 'PipelineHandlerRPi'
[0:10:29.073481056] [3205] DEBUG DeviceEnumerator device_enumerator.cpp:312 Successful match for media device "unicam"
[0:10:29.073627035] [3205] DEBUG DeviceEnumerator device_enumerator.cpp:312 Successful match for media device "bcm2835-isp"
[0:10:29.073813771] [3205] DEBUG Camera camera_manager.cpp:151 Found registered pipeline handler 'PipelineHandlerRkISP1'
[0:10:29.074557088] [3205] DEBUG Camera camera_manager.cpp:151 Found registered pipeline handler 'SimplePipelineHandler'
[0:10:29.074890711] [3205] DEBUG Camera camera_manager.cpp:151 Found registered pipeline handler 'PipelineHandlerUVC'
Available cameras:
luis@RPi4-Ubuntu:~$

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Luis Melendez
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Revision history for this message
Bernard Stafford (bernard010) said : 		#1

https://libcamera.org/getting-started.html

https://libcamera.org/docs.html

Revision history for this message
Luis Melendez (lm782) said (last edit ): 		#2

Thank you, saw those. Guess I could have made my initial steps clearer.

I used libcamera's Getting Started to set everything up and why/how the log level was set to 'debug' to get the report included above. Before my post, I read the docs (as well as FAQs) and could not find anything on troubleshooting. There was something at the bottom of Getting Started (primarily to do with Meson and Ninja), but seems the section is no longer there.

I also posted this issue on GitHub at RaspberryPi/libcamera and libcamera-org/libcamera and was respectively told to work with Ubuntu support since they build and package the libcamera libraries in the OS, and that this is a distro specific issue with Ubuntu.

Lastly, also before posting here, I asked this question on AskUbuntu and have not gotten a response.
https://askubuntu.com/questions/1455240/camera-connected-but-not-available-in-libcamera

Revision history for this message
Luis Melendez (lm782) said : 		#3

Update for anyone that comes across this in the future: Ran apt update, upgrade and rebooted. libcamera is responding (camera is available and capture works).