Can you please attach your Xorg.log?
Thanks, Daniel
On Tue, Jul 14, 2015 at 6:51 AM, Harald Arnesen <[email protected]> wrote:
> 4.2-rc2 gives me an unusable X11 screen (se attached picture).
> 4.2-rc1 is OK.
>
> Bisected to the following:
>
>
> 19ee835cdb0b5a8eb11a68f25a51b8039d564488 is the first bad commit
> commit 19ee835cdb0b5a8eb11a68f25a51b8039d564488
> Author: Chris Wilson <[email protected]>
> Date: Mon Jun 29 14:01:19 2015 +0100
>
> drm/i915: Declare the swizzling unknown for L-shaped configurations
>
> The old style of memory interleaving swizzled upto the end of the
> first even bank of memory, and then used the remainder as unswizzled on
> the unpaired bank - i.e. swizzling is not constant for all memory. This
> causes problems when we try to migrate memory and so the kernel prevents
> migration at all when we detect L-shaped inconsistent swizzling.
> However, this issue also extends to userspace who try to manually detile
> into memory as the swizzling for an individual page is unknown (it
> depends on its physical address only known to the kernel), userspace
> cannot correctly swizzle objects.
>
> v2: Mark the global swizzling as unknown rather than adjust the value
> reported to userspace.
>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91105
> Signed-off-by: Chris Wilson <[email protected]>
> Cc: Daniel Vetter <[email protected]>
> Cc: [email protected]
> Signed-off-by: Daniel Vetter <[email protected]>
>
> :040000 040000 a34dedabcb878bfc55ce76c231d60fc801f79319
> 3e45d34152a15df5cf07fa50e6720c9948ed8a6a M drivers
>
>
>
> And indeed, if I revert this commit, 4.2-rc2 is OK as well.
> Kernel config and dmesg from rc1 and rc2 is attached.
> --
> Hilsen Harald
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
Daniel Vetter [2015-07-14 09:46]:
> Can you please attach your Xorg.log?
Attached Xorg.log from both -rc1 and -rc2.
--
Hilsen Harald