From: "Lu, Ran" <hephooey@gmail.com>
To: Intel Graphics Development <intel-gfx@lists.freedesktop.org>
Subject: Need help debuging Iris Pro on Retina MBP 11.3
Date: Mon, 06 Jan 2014 00:36:20 -0600 [thread overview]
Message-ID: <4065638.LmCAPMqkJG@rmbp> (raw)
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
reply other threads:[~2014-01-06 6:36 UTC|newest]
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