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  • Secondary monitor black after resume

    Hi there,

    I have a Thinkpad T400 w/HD3470 graphics adapter and 1440x900 resolution sitting in a port replicator (DVI out available, external TFT with 1280x1024 resolution). The laptop runs Ubuntu 9.04. First I tried the radeon driver which gave an average 3D performance (not too important) but very high temperatures, even while idling. Yes, I tried the new DynamicPM and ForceLowPowerMode - the temperatur goes down but is still around 55degC. On the other hand switching between single head and big desktop via xrandr works like a charm. Even after suspend/resume w/o having to restart the X-server.

    With the catalyst driver (v9.6, 8.620) it's the other way round: very good performance, very low temperature (40-45degC - at least 10degC cooler!!) but much trouble whith the secondary monitor. X only starts up correctly if the external TFT is disconnected. Then I can switch the secondary display on via xrandr and use a big desktop. But after suspend/resume I have to restart the X-server - otherwise the external TFT would stay black, even though it is listed by xrandr. Even disabling and enabling it via the gnome multi-monitor utility does not help.

    Any ideas are greatly appreciated!

    I'll attach my xorg.conf below

    Cheers,
    Torsten

    -------------------------
    Section "Monitor"
    Identifier "aticonfig-Monitor[0]-0"
    Option "VendorName" "LEN"
    Option "ModelName" "4036"
    Option "DPMS" "true"
    EndSection

    Section "Monitor"
    Identifier "aticonfig-Monitor[0]-1"
    Option "VendorName" "ATI Proprietary Driver"
    Option "ModelName" "Generic Autodetecting Monitor"
    Option "DPMS" "true"
    EndSection

    Section "Screen"
    Identifier "aticonfig-Screen[0]-0"
    Device "aticonfig-Device[0]-0"
    Monitor "aticonfig-Monitor[0]-0"
    DefaultDepth 24
    SubSection "Display"
    Viewport 0 0
    Depth 24
    Virtual 2720 1024
    EndSubSection
    EndSection

    Section "Screen"
    Identifier "aticonfig-Screen[0]-1"
    Device "aticonfig-Device[0]-1"
    Monitor "aticonfig-Monitor[0]-1"
    DefaultDepth 24
    SubSection "Display"
    Viewport 0 0
    Depth 24
    Virtual 2720 1024
    EndSubSection
    EndSection

    Section "ServerLayout"
    Identifier "aticonfig Layout"
    Screen 0 "aticonfig-Screen[0]-0" 0 0
    Screen 1 "aticonfig-Screen[0]-1" RightOf "aticonfig-Screen[0]-0"
    EndSection

    Section "Device"
    Identifier "aticonfig-Device[0]-0"
    Driver "fglrx"
    BusID "PCI:1:0:0"
    Screen 0
    EndSection
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