Dell Laptop does not find integrated Webcam

I have a Dell Latitude 7640. I am running on this Laptop Ubuntu 23.04 and Windows 11. So the problem is, that Windows does find my integrated camera, but when I open cheese in Ubuntu, then it does say "No device found". I also tried to find my camera in terminal with couple of commands but nothing seems to recognize a webcam. What can I do?

Edit: I can not see any camera devices, when I run sudo journalctl -b 0

After typing this command sudo lshw -C video I get this output:

  *-display                 
       Beschreibung: VGA compatible controller
       Produkt: Raptor Lake-P [Iris Xe Graphics]
       Hersteller: Intel Corporation
       Physische ID: 2
       Bus-Informationen: pci@0000:00:02.0
       Logischer Name: /dev/fb0
       Version: 04
       Breite: 64 bits
       Takt: 33MHz
       Fähigkeiten: pciexpress msi pm vga_controller bus_master cap_list rom fb
       Konfiguration: depth=32 driver=i915 latency=0 mode=1920x1200 resolution=1920,1200 visual=truecolor xres=1920 yres=1200
       Ressourcen: iomemory:600-5ff iomemory:400-3ff irq:201 memory:6055000000-6055ffffff memory:4000000000-400fffffff ioport:3000(Größe=64) memory:c0000-dffff memory:4010000000-4016ffffff memory:4020000000-40ffffffff

With this command ls -l /dev/vid*;id I get:

crw-rw----+ 1 root video 81, 0 Mai 30 10:07 /dev/video0
uid=1000(nathan) gid=1000(nathan) Gruppen=1000(nathan),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),100(users),118(lpadmin)

The command and its result:

ls -l /dev/vid*;id
crw-rw----+ 1 root video 81, 0 Mai 30 10:07 /dev/video0
uid=1000(nathan) gid=1000(nathan) Gruppen=1000(nathan),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),100(users),118(lpadmin)

show us that:

1. You're producing non-English outputs. Since AskUbuntu is an English language site, you should preface your commands with LANG=C command to generate messages in English.
2. /dev/video0 is owned by [root,video].
3. /dev/video0's permissions (rw-rw----) say it can be read/written by its owner (root) and by members of the video group, and NOT by "other".
4. The id command shows that you're not in the video group, so you're "other".

To fix, join the video group:

sudo adduser $USER video

Then logout/login, because groups are set up by login.

I have the same device & system and I am facing the same problem.

sudo lshw -C video

produces

  *-display                 
   description: VGA compatible controller
   product: Raptor Lake-P [Iris Xe Graphics]
   vendor: Intel Corporation
   physical id: 2
   bus info: pci@0000:00:02.0
   logical name: /dev/fb0
   version: 04
   width: 64 bits
   clock: 33MHz
   capabilities: pciexpress msi pm vga_controller bus_master cap_list rom fb
   configuration: depth=32 driver=i915 latency=0 mode=1920x1200 resolution=1920,1200 visual=truecolor xres=1920 yres=1200
   resources: iomemory:600-5ff iomemory:400-3ff irq:201 memory:6055000000-6055ffffff memory:4000000000-400fffffff ioport:3000(size=64) memory:c0000-dffff memory:4010000000-4016ffffff memory:4020000000-40ffffffff

And

ls -l /dev/vid*;id

returns

ls: cannot access '/dev/vid*': No such file or directory
uid=1000(user) gid=1000(user) groups=1000(user),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),122(lpadmin),135(lxd),136(sambashare)

When plugging in an external webcam and asking lsusb I get

Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 003: ID 0a5c:5843 Broadcom Corp. 58200
Bus 002 Device 002: ID 8086:0b63 Intel Corp. USB Bridge
Bus 002 Device 007: ID 0c45:6367 Microdia USB 2.0 Camera
Bus 002 Device 004: ID 8087:0033 Intel Corp. 
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub