Same problem here.
My graphics cards:
kernel 3.11: o.k.Code:lspci | grep VGA 01:05.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RS880M [Mobility Radeon HD 4225/4250] 02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Park [Mobility Radeon HD 5430/5450/5470]
kernel 3.12: vgaswitcheroo disappears
kernel 3.13: freeze 10sec after boot( if run something with discrete card, do not freeze)
likekernel 3.13, DPM disabled:freeze againCode:DRI_PRIME=1 glxgears
If you're running Arch Linux, it seems like the linux-git AUR package builds successfully: https://aur.archlinux.org/packages/linux-git/
And I've had no crashes, and vgaswitcheroo/switch remains and reports dynamic power in my discrete GPU.
This bug is still present in 3.12.3 and 3.13-rc2 in opensuse. Is there any news related to the bug?
Thank you for your fast reply. I saw a couple of bug repots with this commit mentioned.
Does it mean that vga_switcheroo should be changed in order to work with this commit or the guys from Intel should fix acpi behavior?
I guess current problem affects all laptop users who tries to save the energy by disabling the discrete card.
With acpiphp.disable=1 in line GRUB_CMDLINE_LINUX_DEFAULT
all O.K. on my system