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PowerXpress won't even try to work

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  • PowerXpress won't even try to work

    I have Intel HD Graphics P4600 as my boot video device, and a Radeon R9 290 as my secondary video device.
    Isn't that video card supposed to support PowerXpress switching?

    If I do aticonfig --px-dgpu and restart Xorg, the X server starts only on the discrete GPU, and the Intel-connected monitor freezes.
    If I do aticonfig --px-igpu and restart Xorg, the same thing happens; I'd expect the Intel GPU to be used.

    In both cases, the Intel GPU's output actually freezes entirely -- not even ctrl-alt-f# or sysrq-k (SAK) or sysrq-v (restore video) will make it redraw.
    The only way to unfreeze the monitor is to stop Xorg, replace xorg.conf with one that explicitly uses the Intel driver, then start Xorg.

    My Xorg log didn't even mention trying to initialize the Intel card -- as if the Intel GPU just plain does not exist.
    I'm guessing the fglrx driver is missing an entry for that device ID.
    00:02.0 VGA compatible controller [0300]: Intel Corporation Xeon E3-1200 v3 Processor Integrated Graphics Controller [8086:041a] (rev 06)

    I'm now using that drive in another system, so it would be a pain to move it back to try to recreate the Xorg log.
    The only mention of Intel was the first of these two device-ID lines:
    (--) PCI:*(0:0:2:0) 8086:041a:8086:2010 rev 6, Mem @ 0xee400000/4194304, 0x80000000/268435456, I/O @ 0x0000f000/64
    (--) PCI:*(0:2:0:0) 1002:67b1:174b:e285 rev 0, Mem @ 0xd0000000/268435456, 0xcf800000/8388608, 0xfba80000/262144, I/O @ 0x0000a000/256, BIOS @ 0x????????/131072
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