Ubuntu
xorg package

  1. Bug #312756
  2. Comment #213

Comment 213 for bug 312756

Revision history for this message
Stefan Gustafsson (stefan-sgnet) wrote : Re: support graphics card hot switch

Been looking around my DSDT.dsl file and found that using \_SB.PCI0.PEGP.VGA._OFF probably turns off my discrete graphics card.
After I run echo '\_SB.PCI0.PEGP.VGA._OFF' > /proc/acpi/call the laptop runs abit cooler, and the lspci -v gives me
01:00.0 VGA compatible controller: nVidia Corporation Device 0a69 (rev ff) (prog-if ff)
 !!! Unknown header type 7f

echo '\_SB.PCI0.PEGP.VGA._ON' > /proc/acpi/call the temperature increases almost instant. and lspci -v produces
01:00.0 VGA compatible controller: nVidia Corporation Device 0a69 (rev a2)
 Subsystem: Hewlett-Packard Company Device 142e
 Flags: bus master, fast devsel, latency 0, IRQ 11
 Memory at f0000000 (32-bit, non-prefetchable) [size=16M]
 Memory at c0000000 (64-bit, prefetchable) [size=256M]
 Memory at d0000000 (64-bit, prefetchable) [size=32M]
 I/O ports at 4000 [disabled] [size=128]
 Expansion ROM at f1080000 [disabled] [size=512K]
 Capabilities: <access denied>
 Kernel modules: nvidiafb, nouveau

I'am using an HP DM3-1130eo laptop. (see comment above)