From: syl@therockgarden.ca   
      
   On 2023-05-02, Petri Kaukasoina wrote:   
      
   > I don't think SDDM is lightweight. kdm in 14.2 is lightweight and   
   > fast. SDDM uses direct rendering via opengl, and I guess it expects   
   > more than the old Intel graphics can deliver.   
      
   Oh!  Well that's certainly significant, then.  This system is definitely   
   not up to opengl (it's a small Sony Vaio "netbook", intended for   
   lighhtweight tasks).   
      
   > After I remove file /usr/lib64/dri/i915_dri.so, sddm behaviour becomes   
   > better. Then the llvmpipe software rasterizer does the rendering   
   > instead of the i915 "amber" hardware driver. And it seems to work   
   > better...   
      
   I do see that i915 is loaded on this system, but *not* i915_dri.  ah   
   wait ... you're referring to a library, not the kernel module ...   
      
   indeed ...   
      
      COMMAND     PID USER  FD   TYPE ... NAME   
      Xorg       4625 root mem    REG ... /usr/lib/dri/i915_dri.so   
      kwin_x11   4915  syl mem    REG ... /usr/lib/dri/i915_dri.so   
      plasmashe  4964  syl mem    REG ... /usr/lib/dri/i915_dri.so   
      kmix       5003  syl mem    REG ... /usr/lib/dri/i915_dri.so   
      wpa_gui    5061  syl mem    REG ... /usr/lib/dri/i915_dri.so   
      firefox    6118  syl mem    REG ... /usr/lib/dri/i915_dri.so   
      kscreenlo 15977  syl mem    REG ... /usr/lib/dri/i915_dri.so   
      
   so ... definitely something worth looking into here ...  Thank you.   
      
   > Even better, move to xdm. ...   
      
   I might just do that, but I'd *like* to use the newer display manager   
   if I can, especially if it isn't *really* the problem.   
      
   --   
   ----------------------------------------------------------------------   
   Sylvain Robitaille                                syl@therockgarden.ca   
   ----------------------------------------------------------------------   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)