Tunie

Dear Nando I'm not absolutely certain if you want comprehensive support-questions like this in this thread, and if you don't, I'm ready to comply. My issue is a very persistent error 12 that, by all I know, shouldn't be there at all, but nonetheless decisively refuses to disappear, no matter what I try. I'm going to give you a quick overview of the current state of affairs, that I will expand on demand. The system in question is as follows: – Alienware m17x R3; Win7 Home Premium – 2nd Gen Sandy Bridge Chipset (HM67 with i7-2760QM) – Has an Intel iGPU (HD Graphics 3000). – Had an ATI dGPU, which I physically removed (HD 6990M). – I'm using a BPlus PE4C V1.2 (mPCIe) with an NVidia GeForce 210 (also tested to no avail with an NVidia GeForce GTS 450 and an ATI Radeon HD 3870x2). – TOLUD is 2.49 GB as read out by Setup 1.3. Now this is what I already did (not necessarily in this order; and in varying combinations with several windows reinstalls in between): Removed dGPU to free up PCI allocation space and prevent compatibility-complications (also removed drivers with dedicated software). More or less successfully did a DSDT-Override (Large Memory appeared, but the eGPU problems got even worse with new freezes and BSODs during boot, so I reset the system a little later. Maybe I damaged something while fixing the compiler errors.) Tried to introduce/hotplug the eGPU at different moments: Before powering on the Laptop During Win7 bootscreen During standby mode While in Setup 1.3 But the laptop doesn’t register the eGPU at all if it isn‘t already connected at startup. Not even Setup 1.3‘s would notice it otherwise. Used Setup 1.3 for multiple 32-bit (and 36-bit) PCI-compactions, of which only those worked that used the iGPU and eGPU or less as scope. (I also tried different 36-bit compactions while the DSDT-override was still active, but Win7’s boot froze or BSODd in any of those scenarios.) Probably unnecessarily manually allocated the I/O port of the eGPU via Setup 1.3 (refering to T10 of your troubleshooting FAQ). Though I don't know with certainty how to find out if the I/O port allocated by windows actually differs from the one allocated by Setup 1.3, and I generally don't quite know how all this addressing-business works. I also tried a lot of other small stuff that I don’t remember anymore. Still, after all this – error 12 in all cases. I’m almost at my wits end now, having tried pretty much everything the internet seems to have to offer on this matter; even though error 12 shouldn’t have occurred in the first place, with my TOLUD being well in the acceptable range (plus the address-space being freed up by the removed dGPU; and the laptop even has unused RAM upgrade capabilities, which, as far as I know, should translate into even more free address-space). Now I wonder if you see something essential that I forgot to try, or if you, who in contrary to me knows what he is talking about and has tons of experience in this field, may have some further ideas to takle that error 12. => If needed I will readily provide further information.