[Bug 558395] [NEW] vga_switcheroo sony-vaio-z-series

[Giacomo Bagnoli]

Public bug reported:

Linux ubik 2.6.34-rc3-git #14 SMP PREEMPT Thu Apr 8 09:37:43 CEST 2010
x86_64 Intel(R) Core(TM) i5 CPU M 520 @ 2.40GHz GenuineIntel GNU/Linux

$ sudo dmidecode -s system-product-name
VPCZ11X9E
$ sudo dmidecode -s system-version
J0044RC7

This laptop has the "dynamic hybrid graphic system" which is supposed to switch (on windows) the used graphic card based on load.
It has a button to choose between "Speed" (nvidia) "Stamina" (intel) and "Auto".
I'm running the latest kernel git code, plus branches drm-next, acpi/test and nouveau/master merged in (but the same happen with vanilla 2.6.24-rc3 and 2.6.33). 
If I enable i915.modeset=1 at startup, I get a black screen (no ping response) soon after grub. Disabling it makes the boot process to succeed but I need to start X with vesa drivers. Nouveau fails saying that no bios is found for the device. Latest Nvidia binary beta drivers fails with "no device found".
At last, with no nvidia binaries installed, with nouveau enabled in staging, intel, booting with i915.modeset=0 I get no switcheroo files in /sys/kernel/debug where debugfs is mounted.
I happened one time that the pc booted with the "speed" light turned on for no known reason (but nouveau seemed to find the device bios, I can attach related dmesg for that boot too if needed). In that particular boot I got no console (blank screen) and X failed to start (stuck in black screen too) - X was not configured with nouveau but with vesa- ..

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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vga_switcheroo sony-vaio-z-series
https://bugs.launchpad.net/bugs/558395
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