I'm also seeing this issue with the IPU6 camera.
Setup:
Dell Latitude 7450
Ubuntu 26.04 LTS with Hardware-Based FDE
Kernel snap: pc-kernel 7.0.0-15.15 (revision 3419), tracking 26.04/stable
In addition to the iwlwifi firmware failures described above, the Intel
Meteor Lake IPU (00:05.0) fails to probe entirely due to a missing
firmware file.
intel-ipu6 0000:00:05.0: Direct firmware load for
intel/ipu/ipu6epmtl_fw.bin failed with error -2
intel-ipu6 0000:00:05.0: error -ENOENT: Requesting signed firmware
intel/ipu/ipu6epmtl_fw.bin failed
intel-ipu6 0000:00:05.0: probe with driver intel-ipu6 failed with error -2
I've manually confirmed intel/ipu/ipu6epmtl_fw.bin is missing from
/snap/pc-kernel/current/firmware/
As such the camera is completely non-functional with no fallback path. (Note:
The camera does work when booting from the 26.04 live CD)
I did notice re: iwlwifi on this machine that the Wi-Fi (Intel BE200,
0000:72:00.0) was also absent after installation, but became functional
after the pc-kernel snap updated. Looking at the logs, there are still
firmware versions that fail to load (iwlwifi-
gl-c0-fm-c0-c101/c100/102.ucode), but a fallback version is now present
in the snap. (Which suggests the snap was updated to include some
previously missing iwlwifi firmware)
Using the workaround as suggested in comment #2 (which includes linux-
firmware-intel-graphics, and hence the IPU6 firmware), I've been able to
get the camera functioning, although the camera does not work after a
fresh boot without manually restarting the user PipeWire session.
systemctl --user restart wireplumber pipewire pipewire-pulse
I don't get this problem with the live CD, and comparing the
environments, (and boot logs / timestamps) I believe this is a race
condition - I presume as a result of the non-standard firmware load path
with the pc-kernel snap. When firmware is loaded from
/lib/firmware/updates (as per the workaround) /dev/media0 is created but
the uaccess ACL has not yet been applied when WirePlumber starts,
resulting in:
wireplumber: ERROR /dev/media0: Failed to open media device at /dev/media0:
Permission denied
wireplumber: Failed to add device for
'/sys/devices/pci0000:00/0000:00:05.0/media0', skipping
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https://bugs.launchpad.net/bugs/2150769
Title:
There is a conflict between the pc-kernel snap and additional firmware
packages
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