'Does X screen saver invoke any hardware detection?'

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List:       freedesktop-xorg
Subject:    Does X screen saver invoke any hardware detection?
From:       Steve Holmes <sdholmes () nlti ! co ! uk>
Date:       2020-08-18 12:23:30
Message-ID: 67db39f1-1a39-86d9-d846-f07466675832 () nlti ! co ! uk
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Since kernel 5.4.0-40 and xorg-server (pkg: xserver-xorg-core) 
2:1.20.8-2ubuntu2.1 I find AMD SOC Radeon LTSP clients boot to a fuzzy 
(but readable) LightDM, and if I login, the desktop and everything else 
in Xubuntu is blurry/fuzzy and stays that way.

But if I leave LightDM to timeout to a blank screen (the default X 
screensaver 10 minutes) then move the mouse, LightDM is now sharp and 
logging in to Xfce all remains sharp.

Does X screensaver do any extra or different hardware detection?

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          <p><font face="Helvetica, Arial, sans-serif">Since kernel
              5.4.0-40 and xorg-server (pkg: xserver-xorg-core)
              2:1.20.8-2ubuntu2.1 I find AMD SOC Radeon LTSP clients
              boot to a fuzzy (but readable) LightDM, and if I login,
              the desktop and everything else in Xubuntu is blurry/fuzzy
              and stays that way. <br>
            </font></p>
          <p><font face="Helvetica, Arial, sans-serif">But if I leave
              LightDM to timeout to a blank screen (the default X
              screensaver 10 minutes) then move the mouse, LightDM is
              now sharp and logging in to Xfce all remains sharp.</font></p>
          <p><font face="Helvetica, Arial, sans-serif">Does X
              screensaver do any extra or different hardware detection?<br>
            </font> </p>
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