sudo dmesg --follow shortly after rebooting and found these messages at the end of the output. It seems to come out several times. A few lines around that are
[ 139.356270] ------------[ cut here ]------------ [ 139.356272] Unknown pixelformat 0x00000000 [ 139.356309] WARNING: CPU: 1 PID: 3056 at /build/linux-7kdHqT/linux-4.15.0/drivers/media/v4l2-core/v4l2-ioctl.c:1291 v4l_fill_fmtdesc+0xf41/0x1250 [videodev]
dmesg output can be seen at https://pastebin.com/4YxinP3Z
System is a Dell XPS-13 9370 with Intel video adapter.
hbarta@karakum:~$ cat /etc/issue Ubuntu 18.04.2 LTS \n \l hbarta@karakum:~$ uname -a Linux karakum 4.15.0-46-generic #49-Ubuntu SMP Wed Feb 6 09:33:07 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux hbarta@karakum:~$ lspci|grep VGA 00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07) hbarta@karakum:~$
What problem is being reported? Should I be concerned? How can I fix and should I file a bug report?
I was not looking for an issue when I say this so on the surface, it seems innocuous.