Debian Installation :: Jessie Install With Switchable Graphics

Somehow got it partly to work. I have a new installation and I am using the 4.1 kernel now. I can switch on the Radeon chip which is great, but still have some trouble when trying to turn it completely off.

I have an Acer Aspire 4820TG Laptop with:
Core: i7-640M
integrated graphics: Intel
discrete graphics: Radeon Mobility 5650HD

I have installed Debian Jessie. After installing the non-free firmware for my ATI chip (following [URL] .....) so I could use vgaswitcheroo, the system broke.

The problem looks as follows: When I start the system the graphical login screen gets stuck and the console tells me first:

Code: Select allradeon 0000:01:00.0: Userspace still has active objects!

then a lot of numbers, then

Code: Select allradeon 0000:01:00.0: ring 5 stalled for more than 10000 msec
[drm:uvd_v1_0_ib_test] *ERROR* radeon: fence wait failed (-35).
[drm:radeon_ib_ring_tests] *ERROR* radeon: failed testing IB on ring 5 (-35).

and this repeats once (or twice?) until several new messages arrive.

Those pause at

Code: Select allFixing recursive faul but reboot is needed !

Then again lots of more error messages until the everything freezes, with the last message

Code: Select all---[ end trace 13dfd971ff8e0aed]---

(Might contain typos. I don't know how to get the whole messages since the system dies a minute after booting and I only have a few seconds after the error messages start)

Even when I prevented the xserver from starting at boot I still got the same problems.

I would very much like to be able to switch between my chips, because I can only use external monitors when the ATI chip is active, but I would also like to be able to use the battery saving internal chip option.

I also tried to install the proprietary driver (though I would prefer if I didn't have to do that), but I couldn't get the xserver to work while it was installed.

lscpi output:
Code: Select all00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 18)
00:01.0 PCI bridge: Intel Corporation Core Processor PCI Express x16 Root Port (rev 18)
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 18)
00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)
00:1a.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)

[Code] ....