XFCE4 - loading startup log spam

I'm on March 24th's current iso and reinstalled i basically because X was a mess. I thought it was old copied-over config stuff. Bit XFCE4 still is a mess, except many of the parts are known good.

/var/log/Xorg.0.log is clean - no errors. I sorted all that, mostly by installing stuff like NetworkManager that I wouldn't use in a fit. Here's the abridged output of startx > X.err 2>&1. Don't worry about hplip - I haven't attacked printing yet.
Code:Snip introductory trivia--
(==) Using config directory: "/etc/X11/xorg.conf.d"
--SNIP more verbiage
/usr/bin/iceauth: creating new authority file /var/run/user/1000/ICEauthority
gpg-agent[5307]: WARNING: "--write-env-file" is an obsolete option - it has no effect
gpg-agent[5308]: gpg-agent (GnuPG) 2.2.20 started

(xfce4-session:5301): xfce4-session-WARNING **: 17:45:02.561: gpg-agent returned no PID in the variables

(xfsettingsd:5313): xfsettingsd-WARNING **: 17:45:02.668: Unknown mode '1024x768 @ 120.0' for output HDMI1, aborting.

ESC[01mHP Linux Imaging and Printing System

SNIP extensive verbiage from CUPS. Windows has a simple printer driver. Why do we have to put up with cups?

blueman-applet 17.45.04 ERROR PluginManager:90 load_plugin: Unable to load plugin module KillSwitch
Traceback (most recent call last):
File "/usr/lib64/python3.8/site-packages/blueman/main/PluginManager.py", line 88, in load_plugin
importlib.import_module(self.module_path.__name__ + ".%s" % plugin)
File "/usr/lib64/python3.8/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 783, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
blueman-applet 17.45.04 ERROR PluginManager:90 load_plugin: Unable to load plugin module KillSwitch
Traceback (most recent call last):
File "/usr/lib64/python3.8/site-packages/blueman/main/PluginManager.py", line 88, in load_plugin
importlib.import_module(self.module_path.__name__ + ".%s" % plugin)
File "/usr/lib64/python3.8/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 783, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/usr/lib64/python3.8/site-packages/blueman/plugins/applet/KillSwitch.py", line 23, in <module>
raise ImportError('Hardware kill switch not found')
ImportError: Hardware kill switch not found
blueman-applet 17.45.04 WARNING PluginManager:147 __load_plugin: Not loading DhcpClient because its conflict has higher priority
blueman-applet 17.45.04 WARNING PluginManager:147 __load_plugin: Not loading PPPSupport because its conflict has higher priority
blueman-applet 17.45.04 WARNING DiscvManager:109 update_menuitems: warning: Adapter is None
(II) AIGLX: Suspending AIGLX clients for VT switch

ESC[01mHP Linux Imaging and Printing System (ver. 3.20.3)ESC[0m

SNIP AGAIN! will cups ever shut up?
HPLIP upgrade function is disabled in Slackware.
Not attempting to download upgrades.
/usr/share/hplip/base/utils.py:2061: SyntaxWarning: "is" with a literal. Did you mean "=="?
if weburl is "" or weburl is None:To deal with the errors

1. I'd like to remove the obsolete option to gpg-agent, if I had a breeze where it is
2. gpg-agent is obviously puking if it's not returning a PID. My preference is to remove it, but xfce4 seems to want it real bad.
3. I'd like to know what's giving the 1920x1080 16:9 monitor a 4:3 mode. I haven't even got vesa installed. And I don't think my puny HD4000 could keep up, anyhow.
4. We have the python3 KillSwitch module, but the bluetooth hardware is AWOL. I'd like to disable Bluetooth, because getting bluetooth going is like breaking into the Crown Jewels, or Fort Knox, or some such. Blurtooth has always been a tragedy on this box, anyhow.