Dell 7440 camera not working

Support and Help
1

Hi @federicarike,
My MIPI camera was working until the last update few weeks ago. I also have a Dell Latitude 7440 with Ubuntu 22.04. I followed the instructions you gave to @mrivera76 :

My machine

# hostnamectl 
 Static hostname: c:
 Pretty hostname: c:
       Icon name: computer-laptop
         Chassis: laptop
      Machine ID: c:
         Boot ID: c:
Operating System: Ubuntu 22.04.5 LTS              
          Kernel: Linux 6.8.0-51-generic
    Architecture: x86-64
 Hardware Vendor: Dell Inc.
  Hardware Model: Latitude 7440

removing intel-ipu6

# sudo add-apt-repository --remove ppa:oem-solutions-group/intel-ipu6
Repository: 'deb https://ppa.launchpadcontent.net/oem-solutions-group/intel-ipu6/ubuntu/ jammy main'
Description:
This is a edge development branch to integrating the Intel MIPI IPU6 stack.

*** Please DON T use ppa:oem-solutions-group/intel-ipu6 in your daily work because this is a development PPA that it will often break the MIPI camera during the development. ***

https://wiki.ubuntu.com/IntelMIPICamera
...
Get:28 http://es.archive.ubuntu.com/ubuntu jammy-backports/multiverse amd64 DEP-11 Metadata [212 B]
Fetched 1.424 kB in 2s (616 kB/s)   
Reading package lists... Done

Updating and installing linux-modules-ipu6-generic-hwe-22.04

sudo apt update

sudo apt-get install --no-install-recommends --yes \
    linux-generic-hwe-22.04 \
    linux-modules-ipu6-generic-hwe-22.04 \
    linux-modules-usbio-generic-hwe-22.04
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
linux-generic-hwe-22.04 is already the newest version (6.8.0-51.52~22.04.1).
linux-modules-ipu6-generic-hwe-22.04 is already the newest version (6.8.0-51.52~22.04.1).
linux-modules-usbio-generic-hwe-22.04 is already the newest version (6.8.0-51.52~22.04.1).
The following packages were automatically installed and are no longer required:
  linux-modules-iwlwifi-generic-hwe-22.04 linux-modules-iwlwifi-oem-22.04b
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

sudo apt-get autoclean
sudo apt-get autoremove
sudo reboot

As you mentioned, I should use Lapras for Latitude 7440, but it cannot be installed. I have a limitation here by my company and I cannot upgrade from Ubuntu 22.04 to Ubuntu 24.04:

EDITED

sudo add-apt-repository --list
deb http://es.archive.ubuntu.com/ubuntu/ jammy main restricted multiverse universe
deb http://es.archive.ubuntu.com/ubuntu/ jammy-updates main restricted multiverse universe
deb http://es.archive.ubuntu.com/ubuntu/ jammy-backports main restricted multiverse universe
deb http://security.ubuntu.com/ubuntu jammy-security main restricted multiverse universe
deb http://repository.spotify.com stable non-free
deb https://ppa.launchpadcontent.net/touchegg/stable/ubuntu/ jammy main
deb [arch=amd64] https://dl.google.com/linux/chrome/deb/ stable main
deb http://dell.archive.canonical.com/ jammy somerville-lapras-13 somerville-lapras somerville
deb [arch=amd64,arm64,armhf] https://packages.microsoft.com/repos/code stable main
deb https://cloud.r-project.org/bin/linux/ubuntu jammy-cran40/
deb https://packagecloud.io/slacktechnologies/slack/debian/ jessie main


(base) fgome1@bsc-848818430:~$ sudo apt install oem-somerville-lapras-meta 
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following additional packages will be installed:
  oem-somerville-meta
The following NEW packages will be installed:
  oem-somerville-lapras-meta oem-somerville-meta
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 4.850 B of archives.
After this operation, 29,7 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://dell.archive.canonical.com jammy/somerville amd64 oem-somerville-meta all 22.04ubuntu2 [2.040 B]
Get:2 http://dell.archive.canonical.com jammy/somerville-lapras amd64 oem-somerville-lapras-meta all 22.04ubuntu9 [2.810 B]
Fetched 4.850 B in 0s (19,0 kB/s)                      
Selecting previously unselected package oem-somerville-meta.
(Reading database ... 348229 files and directories currently installed.)
Preparing to unpack .../oem-somerville-meta_22.04ubuntu2_all.deb ...
Unpacking oem-somerville-meta (22.04ubuntu2) ...
Selecting previously unselected package oem-somerville-lapras-meta.
Preparing to unpack .../oem-somerville-lapras-meta_22.04ubuntu9_all.deb ...
Unpacking oem-somerville-lapras-meta (22.04ubuntu9) ...
Setting up oem-somerville-meta (22.04ubuntu2) ...
Processing triggers for libglib2.0-0:amd64 (2.72.4-0ubuntu2.4) ...
Setting up oem-somerville-lapras-meta (22.04ubuntu9) ...
/usr/sbin/update-grub
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Sourcing file `/etc/default/grub.d/oem-flavour.cfg'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-6.8.0-51-generic
Found initrd image: /boot/initrd.img-6.8.0-51-generic
Found linux image: /boot/vmlinuz-6.8.0-50-generic
Found initrd image: /boot/initrd.img-6.8.0-50-generic
Memtest86+ needs a 16-bit boot, that is not available on EFI, exiting
Warning: os-prober will not be executed to detect other bootable partitions.
Systems on them will not be added to the GRUB boot configuration.
Check GRUB_DISABLE_OS_PROBER documentation entry.
Adding boot menu entry for UEFI Firmware Settings ...
done

After this, my camera is still not working.

Cheese says the first line 16 times:

cheese
(cheese:6175): GLib-GObject-CRITICAL **: 11:30:34.941: g_value_dup_string: assertion 'G_VALUE_HOLDS_STRING (value)' failed
(cheese:6175): cheese-WARNING **: 11:30:34.944: Device '/dev/video0' does not support 2:0:0:0 colorimetry: ../sys/v4l2/gstv4l2object.c(4105): gst_v4l2_object_set_format_full (): /GstCameraBin:camerabin/GstWrapperCameraBinSrc:camera_source/GstBin:bin18/GstV4l2Src:v4l2src1:
Device wants 2:0:0:0 colorimetry

and VLC says

vlc v4l2:///dev/video0
VLC media player 3.0.16 Vetinari (revision 3.0.13-8-g41878ff4f2)
[00006073fe4a8640] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
Using mplane plugin for capture 
[000078298c001130] v4l2 demux error: cannot get streaming parameters: Inappropriate ioctl for device
libv4l2: error turning on stream: Link has been severed
[000078298c001130] v4l2 demux error: cannot start streaming: Link has been severed
Using mplane plugin for capture 
[000078298c001130] v4l2 demux error: not a radio tuner device
Using mplane plugin for capture 
[000078298c0079e0] v4l2 stream error: cannot get streaming parameters: Inappropriate ioctl for device
libv4l2: error turning on stream: Link has been severed
[000078298c0079e0] v4l2 stream error: cannot start streaming: Link has been severed
QObject::~QObject: Timers cannot be stopped from another thread

Cheers and thanks in advance for any help!

2

Hi @FilipoRviz,

First off, let us remove not only the repository but also all the packages linked to ipu6 or ipu7
sudo apt autopurge oem-*-meta libia-* libgcss* libipu* libcamhal*
sudo apt autopurge lib*ipu6*
sudo apt autopurge lib*ipu7*

Then, what do you get for

sudo ubuntu-drivers list

?
Also, do you have

sudo apt install ubuntu-oem-keyring

and the 8th repository contains

somerville-lapras-13

that is linked to the Dell 7340.

For the new OEM metapackage I checked, but it seems it should need linux-generic-hwe-22.04.

Let us first check the repository/ipu6/7 package thing and the drivers list. Lemme know.

2 Likes
3

Hi @federicarike, thanks for your fast answer.

I removed the packages and rebooted the machine.

`$ sudo apt autopurge oem-*-meta libia-* libgcss* libipu* libcamhal*`  
`$ sudo apt autopurge lib*ipu6*`  
`$ sudo apt autopurge lib*ipu7*`
...
The following packages will be REMOVED:
  libcamhal-common* oem-somerville-lapras-13-meta* oem-somerville-lapras-meta*
  oem-somerville-meta*
0 upgraded, 0 newly installed, 4 to remove and 0 not upgraded.
...
Removing oem-somerville-meta (22.04ubuntu2) ...
...
Package 'libcamhal-ipu6ep-common' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
...
E: Unable to locate package lib*ipu7*
E: Couldn't find any package by glob 'lib*ipu7*'
$ sudo reboot

Despite of purging with apt (I doubleckhecked with apt remove and apt autopurge. It says is uninstalled.) , Lapras is still appearing in the list of drivers:

$ sudo ubuntu-drivers list
libfprint-2-tod1-broadcom
oem-somerville-lapras-meta

I checked with the Additional Drivers GUI and Lapras is disabled.

image
image947×558 52.9 KB

and I have installed the oem-keyring:

$ sudo apt install ubuntu-oem-keyring
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
ubuntu-oem-keyring is already the newest version (2021.03.26).

By the way, my machine is a Latitude 7440.

Cheers!

4

@FilipoRviz Perfect! Now that’s all cleaned up, we should be able to install the metapackage for Dell 7440 and have no further issues:

sudo apt install oem-somerville-lapras-meta

I assume that the fingerprint reader is working properly with libfprint-2-tod1-broadcom.
Let us see what happens.
Then

reboot
1 Like
5

Hi @federicarike,

The fingerprint reader is working without issues since the beginning of times. c :

I installed oem-somerville-lapras-meta, rebooted but the camera is not being recognized by Cheese, VLC or Chrome. :c
I checked again with the Additional Drivers GUI, unselected the Lapras, rebooted, installed again and selected again from Drivers GUI.

Launching Cheese from terminal shows the same error (with different ports)

GLib-GObject-CRITICAL **
cheese-WARNING : 10:55:03.067: Device '/dev/video0' does not support 2:0:0:0 colorimetry ...
Device wants 2:0:0:0 colorimetry

UPDATE
My cam works now.

I went back to the Software & Updates GUI, removed the few repeated entries for http://dell.archive.canonical.com/ jammy somerville. After I saved the changes, it updated the cache, I rebooted and then I went back to the Additional Drivers and I found some new drivers.

$ sudo ubuntu-drivers list
oem-fix-misc-cnl-backport-iwlwifi-helper
libfprint-2-tod1-broadcom
oem-somerville-lapras-meta
oem-fix-misc-cnl-i915-disable-psr
libcamhal0

The camera does not works with oem-somerville-lapras-meta
The camera works with oem-fix-misc-cnl-i915-disable-psr

This is the configuration that enables my camera:

image
image949×703 87.5 KB

The libia-* libgcss-* and libcamhal* were installed again.
libipu-* was not installed again

The camera is recognized by Cheese but is not working. I can live with that. : D

(cheese:6708): cheese-WARNING **: 11:33:21.832: Internal data stream error.: ../libs/gst/base/gstbasesrc.c(3127): gst_base_src_loop (): /GstCameraBin:camerabin/GstWrapperCameraBinSrc:camera_source/GstBin:bin18/GstPipeWireSrc:pipewiresrc1:
streaming stopped, reason not-negotiated (-4)

The camera works fine with VLC, Chrome & Zoom.

Thanks for your help!

Cheers.

1 Like
6

That’s amazing! I am happy it worked out!

I was about to suggest you to report the bug on the Cheese page, if you like:
https://bugs.launchpad.net/ubuntu/+source/cheese

That app has quite some issues!

Have an amazing day!

1 Like
7

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