I am using Debian Bullseye and I have been hunting down a resolution to my display port issue. The monitor connected to the display port turns off and on randomly. I replaced my dvi > display adapter as well as the monitor and graphics card. I am using KDE not xfce, and the issue started happening out of no where. I checked my .xsession-errors and whenever it happens I get this output:

kscreen: Requesting missing EDID for outputs (87, 88)
kscreen: Requesting missing EDID for outputs (87, 88)
qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 54814, resource id: 31458240, major code: 19 (DeleteProperty), minor code: 0
qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 54817, resource id: 31458240, major code: 19 (DeleteProperty), minor code: 0
qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 54818, resource id: 31458240, major code: 18 (ChangeProperty), minor code: 0
qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 54819, resource id: 31458240, major code: 19 (DeleteProperty), minor code: 0
qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 54820, resource id: 31458240, major code: 19 (DeleteProperty), minor code: 0
qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 54821, resource id: 31458240, major code: 19 (DeleteProperty), minor code: 0
qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 54822, resource id: 31458240, major code: 7 (ReparentWindow), minor code: 0
qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 54823, resource id: 31458240, major code: 6 (ChangeSaveSet), minor code: 0
qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 54824, resource id: 31458240, major code: 2 (ChangeWindowAttributes), minor code: 0
qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 54825, resource id: 31458240, major code: 10 (UnmapWindow), minor code: 0

My dmesg look like this ever time it happens :

[ 1632.206060] radeon_dp_aux_transfer_native: 32 callbacks suppressed
[ 1681.619089] radeon_dp_aux_transfer_native: 116 callbacks suppressed
[ 1691.035261] radeon_dp_aux_transfer_native: 620 callbacks suppressed
[ 1751.408510] radeon_dp_aux_transfer_native: 116 callbacks suppressed
[ 1788.349239] radeon_dp_aux_transfer_native: 116 callbacks suppressed
[ 1867.122756] radeon_dp_aux_transfer_native: 116 callbacks suppressed
[ 1884.547082] radeon_dp_aux_transfer_native: 368 callbacks suppressed
[ 2173.600344] radeon_dp_aux_transfer_native: 620 callbacks suppressed
[ 2184.684924] radeon_dp_aux_transfer_native: 368 callbacks suppressed
[ 2240.267642] radeon_dp_aux_transfer_native: 242 callbacks suppressed
[ 2247.776015] radeon_dp_aux_transfer_native: 368 callbacks suppressed
[ 2256.276441] radeon_dp_aux_transfer_native: 426 callbacks suppressed
[ 2261.280666] radeon_dp_aux_transfer_native: 410 callbacks suppressed
[ 2266.304866] radeon_dp_aux_transfer_native: 578 callbacks suppressed
[ 2271.321115] radeon_dp_aux_transfer_native: 662 callbacks suppressed
[ 2307.710745] radeon_dp_aux_transfer_native: 74 callbacks suppressed
[ 2317.267183] radeon_dp_aux_transfer_native: 242 callbacks suppressed

my syslog lookg like this:
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: XRandROutput 86 update
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: #011m_connected: 1
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: #011m_crtc QObject(0x0)
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: #011CRTC: 0
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: #011MODE: 0
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: #011Connection: 1
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: #011Primary: false
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: Output 86 : connected = false , enabled = false
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: XRandROutput 87 update
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: #011m_connected: 0
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: #011m_crtc XRandRCrtc(0x55c90985a650)
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: #011CRTC: 80
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: #011MODE: 90
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: #011Connection: 0
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: #011Primary: true
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: Output 87 : connected = true , enabled = true
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: XRandROutput 88 update
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: #011m_connected: 0
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: #011m_crtc XRandRCrtc(0x55c90985ab80)
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: #011CRTC: 81
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: #011MODE: 90
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: #011Connection: 0
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: #011Primary: false
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: Output 88 : connected = true , enabled = true
Dec  5 02:09:37 dtop org.kde.KScreen[2339]: kscreen.xrandr: Emitting configChanged()