Comment 3 for bug 1445970

I am currently running into this same issue on a fresh install of Kubuntu 14.04.

The driver manager lets me choose between three video drivers (fglrx, fglrx-updates, and xserver-xorg-video-ati). If I can pick one of them and click "OK", the window immediately closes and nothing changes. If I click "Apply" instead, some message on a red background (presumably an error message) flashes very briefly, without letting me enough time to read it, then the manager goes back to the "collecting information" phase.

I tried running "/usr/bin/kcmshell4 kcm_driver_manager" in a terminal to get more useful output, and this is all I got:

QDBusArgument& operator<<(QDBusArgument&, const DeviceList&) is noop
const QDBusArgument& operator>>(const QDBusArgument&, DeviceList&)
Dev(
  id: "/sys/devices/pci0000:00/0000:00:03.0/0000:01:00.0"
  modalias: "pci:v00001002d00006738sv0000174Bsd0000174Bbc03sc00i00"
  model: "Barts XT [Radeon HD 6870]"
  vendor: "Advanced Micro Devices, Inc. [AMD/ATI]"
  driver("fglrx-updates" recommended[false] free[false] fromDistro[true] builtin[false] manualInstall[false] fuzzyActive[false] package[0x0])
  driver("fglrx" recommended[false] free[false] fromDistro[true] builtin[false] manualInstall[false] fuzzyActive[false] package[0x0])
  driver("xserver-xorg-video-ati" recommended[true] free[true] fromDistro[true] builtin[true] manualInstall[false] fuzzyActive[false] package[0x0])
)
found error while replying QDBusError("org.freedesktop.DBus.Error.InvalidArgs", "")
found error while replying QDBusError("org.freedesktop.DBus.Error.AccessDenied", "")
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