(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Tue, 09 Feb 2016 08:41:39 +0000 bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=112211 > > Bug ID: 112211 > Summary: ATI Radeon Graphics not rendering correctly > Product: Memory Management > Version: 2.5 > Kernel Version: Linux 4.5-rc3 > Hardware: IA-32 > OS: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: Page Allocator > Assignee: akpm@xxxxxxxxxxxxxxxxxxxx > Reporter: smf.linux@xxxxxxxxxxxx > Regression: No > > On testing linux 4.5-rc( 1,2 and 3) I have found that my display is not > rendered correctly on starting the X server. My screen is mainly black with > portions of the desktop appearing from time to time. I initially raised this > with the DRM/Radeon team: > > https://bugs.freedesktop.org/show_bug.cgi?id=93998 > > On investigation a bisect identified the following commit as the source of my > problem: > > 01c8f1c44b83a0825b573e7c723b033cece37b86 is the first bad commit > commit 01c8f1c44b83a0825b573e7c723b033cece37b86 > Author: Dan Williams <dan.j.williams@xxxxxxxxx> > Date: Fri Jan 15 16:56:40 2016 -0800 > > mm, dax, gpu: convert vm_insert_mixed to pfn_t > > Convert the raw unsigned long 'pfn' argument to pfn_t for the purpose of > evaluating the PFN_MAP and PFN_DEV flags. When both are set it triggers > _PAGE_DEVMAP to be set in the resulting pte. > > There are no functional changes to the gpu drivers as a result of this > conversion. > > Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx> > Cc: Dave Hansen <dave@xxxxxxxx> > Cc: David Airlie <airlied@xxxxxxxx> > Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> > > The problem is present on two AMD/ATI systems I have tried but is absent from > my Intel based laptop. All my systems are 32 bit LFS builds. > > I did try to contact Dan Williams but I am not sure that my e-mail got through, > can anyone suggest a way forward please ? > Does your kernel include commit 03fc2da63b9a33dce784a2075c7e068bb97cbf69 Author: Dan Williams <dan.j.williams@xxxxxxxxx> Date: Tue Jan 26 09:48:05 2016 -0800 mm: fix pfn_t to page conversion in vm_insert_mixed -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>