Hi guys, I just got a Retina MBP with Iris Pro and Nvidia GT 750. The IGD works in OSX(Mavericks), but when I boot into Linux, the device dose not show up in lspci. I debugged the kernel a little, apparently when pci_bus_read_dev_vendor_id is called for PCI 00:2.0 (the intel gpu), it returns 0xffffffff instead of 0x80860d26 and kernel just dropped the device. I can check all the registers in grub using setpci or pcidump, and they looks fine, the first a few bytes are 0x80860d2600070090, according to [1] 0007 means the device is responsive to pci access. So I do not know how to precede from here, because kernel already dropped the device, I do not have access to it in linux, setpci just telling me the device does not exist. I do not know this is caused by some bug in the kernel or there are some apple black magic behind the theme. I also I wonder is there any low level tool I can use to activate the IGD again without going through the pci regs. Any help are deeply appreciated! Thanks a lot! [1] https://01.org/linuxgraphics/sites/default/files/documentation/intel-gfx-prm-osrc-hsw-pcie-config-registers.pdf -- Best Regards, LR _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
