Xorg segmentation fault when PCI is enabled

[prathamrahate]

I am using imx6q-sabresd board. I am following steps from Installing Ubuntu Rootfs on NXP i.MX6 boards. 

My kernel version is 3.14.52 and i am using ubuntu Rootfs 14.04.

My Xorg xserver version is 1.15.1.

When i enable PCI support in kernel startx fails with segmentation fault.

When i disbale PCI support in kernel startx works fine and uses vivante drivers.

Has anyone faced similar issue? Is there any fix for this or patches for pci or drm drivers??

Thanks,

Prathamesh

[igorpadykov]

Hi Prathamesh

one can check if below patches are implemented

lfs/0001-ENGR00239905-PCIe-Enable-PCIe-switch-support.patch at master · texane/lfs · GitHub 

[RFC] PCI: pci-imx6: Add delay to workaround kernel hang 

MX6 and PCIE implementation question? 

Best regards
igor
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[prathamrahate]

Hi Igor,

Thanks for the replay. But this question is not related to PCIe and imx6.

I am observing that if i enable PCI bus support in the kernel, then i am not able to use x11 gpu hardware acceleration(glxgears and es2gears give segmentation faults).

But if i disable PCI support , i could use x11 gpu hardware acceleration with above mentioned versions of xserver.

What role is PCI drivers playing in x11 hardware acceleration? How to get x11 acceleration working with PCI bus support enabled.

Thanks

Prathamesh

[igorpadykov · Accepted solution]

Hi Prathamesh

is it working with nxp linux bsps described on

http://www.nxp.com/products/software-and-tools/software-development-tools/i.mx-software-and-tools/i....

if this is specific ubuntu issue, it could be posted on "Installing Ubuntu Rootfs on NXP i.MX6 boards" thread.

Best regards
igor