> Was able to reboot with strg+alt+F(x) sudo reboot

Once this happens again, can you please collect dmesg and journalctl
(some hundreds of lines are probably enough) before rebooting?

Instead of launching Chromium normally, use

  chromium --enable-logging=stderr > chromium.log 2>&1

Also:

  snap connections chromium
  snap info chromium

> via gürgelschnüffel:
>
> vainfo

First the most important question: What is Gürgelschnüffel?

Now, running vainfo in your host system doesn't help much, because
Chromium is supposed to use the driver provided by the (not ideally
named, I know) Gnome snap,
/snap/gnome-42-2204/current/usr/lib/x86_64-linux-
gnu/dri/iHD_drv_video.so.

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to chromium-browser in Ubuntu.
https://bugs.launchpad.net/bugs/2039701

Title:
  chromium freezes gnome if hardware acceleration is activated in
  browser setttings (U20.04)  Intel HD-Grafik 4400

Status in chromium-browser package in Ubuntu:
  New

Bug description:
  Ubuntu 20.04 have to deaktivate hardware acceleration in browser
  stetting in order to prevent delay and crash of chromium broswer and
  chrome browser. Was able to reboot with strg+alt+F(x) sudo reboot

  found line /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so init failed
  in syslog when crash happened. Let me to this via gürgelschnüffel:

  vainfo
  libva info: VA-API version 1.7.0
  libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so
  libva info: Found init function __vaDriverInit_1_7
  libva error: /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so init failed
  libva info: va_openDriver() returns 1
  libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
  libva info: Found init function __vaDriverInit_1_6
  libva info: va_openDriver() returns 0
  vainfo: VA-API version: 1.7 (libva 2.6.0)
  vainfo: Driver version: Intel i965 driver for Intel(R) Haswell - 2.4.0
  vainfo: Supported profile and entrypoints
        VAProfileMPEG2Simple            :       VAEntrypointVLD
        VAProfileMPEG2Simple            :       VAEntrypointEncSlice
        VAProfileMPEG2Main              :       VAEntrypointVLD
        VAProfileMPEG2Main              :       VAEntrypointEncSlice
        VAProfileH264ConstrainedBaseline:       VAEntrypointVLD
        VAProfileH264ConstrainedBaseline:       VAEntrypointEncSlice
        VAProfileH264Main               :       VAEntrypointVLD
        VAProfileH264Main               :       VAEntrypointEncSlice
        VAProfileH264High               :       VAEntrypointVLD
        VAProfileH264High               :       VAEntrypointEncSlice
        VAProfileH264MultiviewHigh      :       VAEntrypointVLD
        VAProfileH264MultiviewHigh      :       VAEntrypointEncSlice
        VAProfileH264StereoHigh         :       VAEntrypointVLD
        VAProfileH264StereoHigh         :       VAEntrypointEncSlice
        VAProfileVC1Simple              :       VAEntrypointVLD
        VAProfileVC1Main                :       VAEntrypointVLD
        VAProfileVC1Advanced            :       VAEntrypointVLD
        VAProfileNone                   :       VAEntrypointVideoProc
        VAProfileJPEGBaseline           :       VAEntrypointVLD

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