Não importa. Consegui resolver isso: minha resolução de TV não estava sendo detectada corretamente & amp; "System Settings > Displays" estava escrevendo configurações estranhas em meu monitor.xml (ou talvez não tenha sido lido corretamente, não sei).
Solução: Encontrei modelines para minha TV aqui: link . Adicionado ao meu xorg.conf e editado manualmente o meu monitores.xml (ao contrário de usar a interface "Configurações do Sistema > Exibições").
/etc/X11/xorg.conf:
Section "ServerLayout"
Identifier "X.org Configured"
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" RightOf "Screen0"
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "Files"
ModulePath "/usr/lib/xorg/modules"
FontPath "built-ins"
EndSection
Section "Module"
Load "record"
Load "extmod"
Load "dri2"
Load "dri"
Load "dbe"
Load "glx"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5 6 7"
EndSection
Section "Monitor"
Identifier "VGA1"
VendorName "Unplugged"
ModelName "Nothing Plugged In"
HorizSync 30.0 - 83.0
VertRefresh 50.0 - 76.0
Option "DPMS"
EndSection
Section "Monitor"
Identifier "HDMI1"
VendorName "Dell"
ModelName "DELL S2209W"
HorizSync 30.0 - 83.0
VertRefresh 50.0 - 76.0
Option "DPMS"
EndSection
Section "Monitor"
Identifier "HDMI2"
VendorName "Panasonic"
ModelName "PANASONIC-TV"
HorizSync 15.73 - 67.50
VertRefresh 59.94 - 60.0
Modeline "1208x679" 74.25 1208 1353 1393 1650 679 707 712 750 +hsync +vsync
EndSection
Section "Device"
Identifier "Card0"
Driver "intel"
BusID "PCI:0:2:0"
EndSection
Section "Device"
Identifier "Card1"
Driver "intel"
BusID "PCI:0:2:0"
EndSection
Section "Device"
Identifier "Card2"
Driver "intel"
BusID "PCI:0:2:0"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "VGA1"
DefaultDepth 24
SubSection "Display"
Modes "1920x1080" "1280x720" "1208x679" "720x480"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "Screen1"
Device "Card1"
Monitor "HDMI1"
DefaultDepth 24
SubSection "Display"
Modes "1920x1080" "1280x720" "1208x679" "720x480"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "Screen2"
Device "Card2"
Monitor "HDMI2"
DefaultDepth 24
SubSection "Display"
Modes "1920x1080" "1280x720" "1208x679" "720x480"
Depth 24
EndSubSection
EndSection
~ / .config / monitor.xml:
<monitors version="1">
<configuration>
<clone>no</clone>
<output name="VGA1">
</output>
<output name="HDMI1">
<vendor>DEL</vendor>
<product>0xa043</product>
<serial>0x33413055</serial>
<width>1920</width>
<height>1080</height>
<rate>60</rate>
<x>0</x>
<y>0</y>
<rotation>normal</rotation>
<reflect_x>no</reflect_x>
<reflect_y>no</reflect_y>
<primary>yes</primary>
</output>
<output name="HDMI2">
<vendor>MEI</vendor>
<product>0xa060</product>
<serial>0x17009171</serial>
<width>1208</width>
<height>679</height>
<rate>60</rate>
<x>1920</x>
<y>0</y>
<rotation>normal</rotation>
<reflect_x>no</reflect_x>
<reflect_y>no</reflect_y>
<primary>no</primary>
</output>
<output name="DP1">
</output>
<output name="DP2">
</output>
</configuration>
</monitors>
Então, a partir de um terminal:
xrandr --output HDMI2 --mode "1208x679"