XPost: linux.debian.bugs.dist   
   From: m@steiny.biz   
      
   This is a multi-part message in MIME format.   
   Hi there,   
      
   I experimented a bit further trying to find a workaround.   
      
   First I noticed that there is even a kernel warning about the hangig   
   task (see attached log file):   
      
        INFO: task Xorg:1336 blocked for more than 1208 seconds.   
      
   I then tested various kernel options, without success:   
      
   * i915.modeset=0 (disables HDMI completely)   
      
   * intremap=off (no effect)   
      
   * module_blacklist.snd_hda_codec_hdmi (no effect)   
      
   * nomodeset (yields 640x480 only)   
      
   *  ibt=off (no effect)   
      
   * i915.enable_dc=0 i915.enable_dp_mst=false (no effect)   
      
      
   Finally, I tested the old xserver-xorg-video-intel driver with success!   
   I just installed the package and added an Xorg config   
   in /etc/X11/xorg.conf.d/20-intel.conf:   
      
   Section "Device"   
        Identifier "Intel"   
        Driver "intel"   
   EndSection   
      
      
   So, the basic issue definitely seems to be related to the newer driver   
   used by default.   
      
   Best,   
   Maximilian   
      
      
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