Update When camera access is allowed on the page, I can see the remote PC desktop, but when press "Select Serial Device" button Iridium/Chromium browsers crashed.
On Wednesday, October 29th, 2025 at 12:55 PM, Martin <[email protected]> wrote: > Hello > > First time some tests have been performed with OpenBSD 7.7 + Iridium and > Chromium browsers with connected NanoKVM USB (USB camera + audio + uhid input > device emulation) composite device. > > The same machine (OpenBSD 7.7 and 7.8 after upgrade) hosts nginx server with > web page to access NanoKVM USB. > > By opening a link http://nanokvm.local in Iridium or Chromium browser on the > same machine resolves and opens NanoKVM access page with drop down menu which > asks to access camera and microphone device. Once permissions are granted > "Select USB device" drop down menu has appeared with "USB3 Video" and "Select > Serial Device" button to access NanoKVM USB video from remote PC where > NanoKVM is connected. > > Once "Select Serial Device" button is pressed on the nanokvm.local web page, > Iridium and Chromium browsers crash with core dump. > > I would like to solve this in some way, if it was possible. > > Some related system setting and commands are listed below: > > 1. sysctl kern.video.record=1 > > 2. chmod 660 /dev/video* (NanoKVM USB uses video0) > crw-rw---- 1 root wheel /dev/video -> video0 > > crw-rw---- 1 root wheel /dev/video0 > crw-rw---- 1 root wheel /dev/video1 > crw-rw---- 1 root wheel /dev/video2 > crw-rw---- 1 root wheel /dev/video3 > > 3. chmod 660 /dev/uhid* (NanoKVM USB uses uhid0) > crw-rw---- 1 root wheel /dev/uhid0 > crw-rw---- 1 root wheel /dev/uhid1 > crw-rw---- 1 root wheel /dev/uhid2 > crw-rw---- 1 root wheel /dev/uhid3 > crw-rw---- 1 root wheel /dev/uhid4 > crw-rw---- 1 root wheel /dev/uhid5 > crw-rw---- 1 root wheel /dev/uhid6 > crw-rw---- 1 root wheel /dev/uhid7 > > 4. chmod 660 /dev/audio* (NanoKVM USB uses audio1) > crw-rw---- 1 root wheel /dev/audio0 > crw-rw---- 1 root wheel /dev/audio1 > crw-rw---- 1 root wheel /dev/audio2 > crw-rw---- 1 root wheel /dev/audio3 > > 5. Run Iridium (Chromium) with command to get NanoKVM USB device accessible: > > iridium --user-data-dir="/tmp" > --unsafely-treat-insecure-origin-as-secure=http://nanokvm.local > > 6. dmesg part with KVM USB composite device detected: > > uvideo0 at uhub0 port 6 configuration 1 interface 0 "MACROSILICON USB3 Video" > rev 3.20/31.00 addr 4 > video0 at uvideo0 > uaudio0 at uhub0 port 6 configuration 1 interface 3 "MACROSILICON USB3 Video" > rev 3.20/31.00 addr 4 > uaudio0: class v1, high-speed, sync, channels: 0 play, 2 rec, 1 ctls > audio1 at uaudio0 > uhidev0 at uhub0 port 6 configuration 1 interface 4 "MACROSILICON USB3 Video" > rev 3.20/31.00 addr 4 > uhidev: iclass 3/0 > uhid0 at uhidev0: input=0, output=0, feature=8 > > Martin
