Kocayine Posted November 20, 2014 Share Posted November 20, 2014 Hey guys. Ive got this laptop which has an intel gpu and a nvidia gpu which I switch around depending on what I need.. I overclock this nvidia gpu but problem is that these clocks disappear when I switch away from it. Therefore I need a way to detect the GPU being "inserted" (it doesn't appear in device manager before it's in use) I found something with WM_DEVICECHANGE in my googling and thru a script I got this info, which should be what happens when its toggled: WM_DEVICECHANGE Message 537 arrived: WPARAM: 0x8000 LPARAM: 0x1af588 dbch_size = 238, dbch_devicetype = 0x5 dbcc_classguid = 5b45201d-f2f2-4f3b-85bb-30ff1f953599 dbcc_name = \\?\PCI#VEN_10DE&DEV_0A2B&SUBSYS_905A104D&REV_A2#4&4cefabd&0&0008#{5b45201d-f2f2-4f3b-85bb-30ff1f953599} Device 1 - DevInfoData Size 28 - Device Setup Class GUID 4d36e968-e325-11ce-bfc1-08002be10318 - 2648 Name: \\?\pci#ven_10de&dev_0a2b&subsys_905a104d&rev_a2#4&4cefabd&0&0008#{5b45201d-f2f2-4f3b-85bb-30ff1f953599} Device Instance Id: PCI\VEN_10DE&DEV_0A2B&SUBSYS_905A104D&REV_A2\4&4CEFABD&0&0008 SPDRP_FRIENDLYNAME: Not Found, Ret 0 ErrorLevel 0 13 The data is invalid. SPDRP_DEVICEDESC: NVIDIA GeForce GT 330M SPDRP_MFG: NVIDIA SPDRP_CLASS: Display SPDRP_SERVICE: nvlddmkm SPDRP_ENUMERATOR_NAME: PCI SPDRP_PHYSICAL_DEVICE_OBJECT_NAME: \Device\NTPNP_PCI0036 SPDRP_LOCATION_INFORMATION: PCI bus 1, device 0, function 0 Now I just need somehow to have a script that notices just this, then basically launches an exe twice, each with different overclock parameters. I've seen some scripts that should do this with USBs being inserted but I simply cannot find anything that my noobness can figure out, so I was hoping some clever guy in here could help? Thanks! Link to comment Share on other sites More sharing options...
rudi Posted December 4, 2014 Share Posted December 4, 2014 Hi. I don't have the HW to check, just as a start: Device Manager (reflecting various keys/vals in the Registry) can display all known, even not present devices: open a CMD box set devmgr_show_non_present_devices=1 start devmgmt.msc (from within this CMD box!) in device manager, main menu, 3rd entry (maybe "views" in English) --> something like "show hidden devices" That might give you a start to check, what's the difference in Registy / WMI status depending on what GPU is the "inserted" one. Regards, Rudi. Earth is flat, pigs can fly, and Nuclear Power is SAFE! Link to comment Share on other sites More sharing options...
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