On Tue, 07 Jan 2014, "Lu, Ran" <hephooey@xxxxxxxxx> wrote: > Hi Jani, > > As a matter of fact, I tried kernel from 3.9 to 3.13-rc6, all of them cannot > read the pci information from 0:2.0, and lspci do not have Iris Pro as a video > controller. I put in the attachment dmesg output from 3.12.6, I added some > printk to show the results from pci_bus_read_dev_vendor_id, otherwise it is a > vanilla kernel. I do not think I get any extra information by adding > drm.debug=0xe because the pci device is never registered properly, but it was > there anyway.The weird thing is grub can read pci device fine, I took a picture > since I do not know how to save outputs in grub console. I did some test with > another laptop with a working HD 4600. It seems even if I use setpci -s 0:2.0 > 4.b=0 to disable the device, it is still responsive to further setpci and I > can bring it back by setting 4.b=7. Now it does not look like the video card > is disable. I guess maybe something wrong in the ACPI table triggered the > kernel to read the wrong place. But still strange it only missed that > particular bus. In case you are interested, I also put the dsdt table in the > attachment, I can provide other tables if they are important. I don't have much clues here. Are there any bios settings you could tweak? Did you try without the nvidia driver loaded? BR, Jani. -- Jani Nikula, Intel Open Source Technology Center _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
