hansmuster

nando: How do dynamic tolud laptops like t420 with latest bios do with dual gpu cards like gtx 590 or radeon 5970? Do such cards work with tolud or are they still problematic / is tolud not able to generate those 2x256mb space?

Hi, T420 here too but without nvidia. Update to the latest bios. Don't do DSDT override on t420. It will bluescreen your windows! Latest bios got dynamic tolud. Maybe problem is along with your internal card it can't reserve enough. Power on the egpu before pluging it in _and_ before you start the t420. Then power on t420 and let it boot. You might have to wait for a few seconds after windows has bootet. Sometimes windows disables both HD3000 and Radeon for me because of error 22 (probably both fighting for memory blocks) to enable them 20secs later just fine. You might also need to / be able to disable your nvidia card in the bios.

Damn then it probably won't be fixed anytime soon. Well doesnt matter so much for me since all im interested in is OpenCL which works flawlessly. Just the bandwith is a very limiting factor. nando: With your lucid virtu overlay patch is the trial mode disabled overall with it so that i can specify custom apps in the management panel that should be handled via virtu or is this still greyed out? Thanks

Could you boot without a monitor connected (but the gpu connected of course) and see if windows behaves normal / lets you start directx/opengl apps or if they crash? thanks a lot

Hi, did you install the latest radeon 12.11 beta drivers? Is everything still working even if you boot without an external monitor connected? (maybe read my prev post) Thanks & have a lot of fun with your setup!

Hello everybody, first thanks to everyone for the wonderful project and work that went into this. nando you are the man! I have the following setup and problem: Hardware: Lenovo T420 with i7 2640M / HD3000 / 8 GB AMD Radeon HD7870 XT (Tahiti LE chip from 79 series not 78 pitcarn - basically a 7930) PE4L 2.1b via Expresscard PCIe 2.0 x1 Software: Thinkpad latest bios with dynamic tolud Windows 7 Ultimate 64 Latest Radeon 12.11 Beta 11 Latest Intel Problem: The card works without issues. If there is an external monitor connected 3dmark, OpenCL scores are as high as they got unless its a bandwith limiting benchmark. The exernal monitor also has to be primary display. If i boot without an external monitor / internal HD3000 drive display as primary the no so funny stuff begins: DWM.exe instantly crashes Description Faulting Application Path: C:\Windows\System32\dwm.exe Problem signature Problem Event Name: BEX64 Application Name: Dwm.exe Application Version: 6.1.7600.16385 Application Timestamp: 4a5bc541 Fault Module Name: atiuxp64.dll Fault Module Version: 8.14.1.6290 Fault Module Timestamp: 50997922 Exception Offset: 000000000000ffb5 Exception Code: c0000417 Exception Data: 0000000000000000 OS Version: 6.1.7601.2.1.0.256.1 Locale ID: 1031 Additional Information 1: 4c98 Additional Information 2: 4c986f1afca156bb44beaea3a8be6c0d Additional Information 3: 48d9 Additional Information 4: 48d9de7e50286b1747df3c693c2b246f The same thing happens to any directx/opengl app but most of the time with simple stackfaults like: Description Faulting Application Path: C:\Program Files (x86)\Kishonti Informatics\CLBenchmark 1.1.2 Desktop Community Edition\CLBenchmarkDesktopCommunity.exe Problem signature Problem Event Name: APPCRASH Application Name: CLBenchmarkDesktopCommunity.exe Application Version: 0.0.0.0 Application Timestamp: 507d3dbc Fault Module Name: StackHash_0a9e Fault Module Version: 0.0.0.0 Fault Module Timestamp: 00000000 Exception Code: c0000005 Exception Offset: 00000000 OS Version: 6.1.7601.2.1.0.256.1 Locale ID: 1031 Additional Information 1: 0a9e Additional Information 2: 0a9e372d3b4ad19135b953a78882e789 Additional Information 3: 0a9e Additional Information 4: 0a9e372d3b4ad19135b953a78882e789 Description Faulting Application Path: C:\Program Files (x86)\Internet Explorer\iexplore.exe Problem signature Problem Event Name: BEX Application Name: iexplore.exe Application Version: 9.0.8112.16457 Application Timestamp: 50a2f9e3 Fault Module Name: atiuxpag.dll Fault Module Version: 8.14.1.6290 Fault Module Timestamp: 50baff19 Exception Offset: 0000d73f Exception Code: c0000417 Exception Data: 00000000 OS Version: 6.1.7601.2.1.0.256.1 Locale ID: 1031 Additional Information 1: 4a2d Additional Information 2: 4a2d6864df2f476e5b19e40b06c0bd1f Additional Information 3: 9bf2 Additional Information 4: 9bf2352c6d4a5fbabd1481f3627f78c2 This seems connected to ATIs Powerxpress DLLs which provide switchable optimus like technology to AMD platforms. If there is no screen connected to the radeon / not set primary it seems to still try to use the card for offload calculation and then write either in that memory region or of that of the hd3000 for rendering and stackfaults. If i uninstall (not delete the driver) the card in system settings and reboot it fixes part of the problem. The card gets detected on startup, driver installed. However since the directx/opengl etc powerxpress etc dlls will not be hooked into the system until a restart everything is fine. I just cannot use opengl/directx whatever over the card. I can however use OpenCL etc (which my primary reason for the egpu radeon but its still annoying). If i then reboot without uninstalling the card before it i get the mentioned problems again. The amd drivers then hook into the system and everything that uses hardware accelerated graphics stackfaults either like clbenchmark or on the ati powerxpress dlls like dwm, inetexplorer etc. I have tested numerous ati drivers, reinstalled windows, numerous intel drivers etc pp It is possible to still use the opengl/directx acceleration of the card when on internal screen is lucid virtu. Since lucid directly interfaces the card it also works if the card was uninstalled before reboot. Only problem is the trial does not let you specify which apps the accelerate on your own. Only the preset game list will work and with the banner which of course could be cracked away. Anybody (maybe nando the man himself with his 7870) experience(d) the same issue with AMD drivers? Can you try to boot without external screen and start up e.g. GPU Caps Viewer and run opengl/opencl tests on the AMD hardware / platform? Any clue that i might try so that i dont need to uninstall the card before every reboot? Also i have read about those 1xE 2xE pcie modes. Is this possible with my setup? Thanks a lot guys & keep up the nice work PS: Can only recommend the 7870 XTs. Got like 4x the double precision performance of the normal 7870s / GTX680s since it is a tahiti card. Absolut bang for the money especially for opencl calculation.