https://bugs.freedesktop.org/show_bug.cgi?id=69790
Priority: medium Bug ID: 69790 Assignee: dri-devel@lists.freedesktop.org Summary: [HSW ULT] testdisplay : The output of 720x576 mode is dislocated Severity: major Classification: Unclassified OS: All Reporter: qingshuai.tian@intel.com Hardware: Other Status: NEW Version: unspecified Component: libdrm Product: DRI
Created attachment 86503 --> https://bugs.freedesktop.org/attachment.cgi?id=86503&action=edit dmesg: 720x576 mode dislocated
System Environment: -------------------------------------------- Kernel: (drm-intel-next-queued)1b068ee25776533074251f1c6276c5f720c0284b Some additional commit info: Author: Jani Nikula jani.nikula@intel.com Date: Fri Sep 20 16:42:17 2013 +0300
drm/i915/dp: read DPCD PSR capability only on eDP
Description: -------------------------------------------- When I test display in 720x576 mode with argument -a,-d or -t,the image dislocated.
CRTS(3):[0] 720x576 50 720 732 796 864 576 581 586 625 0xa 0x40 27000
Reproduce steps: -------------------------------------------- 1. plug in HDMI 2. boot up machine 3. testdisplay
https://bugs.freedesktop.org/show_bug.cgi?id=69790
--- Comment #1 from Qingshuai Tian qingshuai.tian@intel.com --- Created attachment 86504 --> https://bugs.freedesktop.org/attachment.cgi?id=86504&action=edit The dislocated picture
https://bugs.freedesktop.org/show_bug.cgi?id=69790
--- Comment #2 from Ville Syrjala ville.syrjala@linux.intel.com --- I managed to reproduce this on my HSW. But it seems that it's somehow random as it doesn't happen every time. It's rather hard to reproduce actually when you just retry the same mode w/ 'testdisplay -o'.
There's no difference in dmesg between a good and bad modesets using the same mode.
As it stands, I don't have any good ideas as to what might be happening.
https://bugs.freedesktop.org/show_bug.cgi?id=69790
Guang Yang guang.a.yang@intel.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Hardware|Other |All OS|All |Linux (All) Assignee|dri-devel@lists.freedesktop |intel-gfx-bugs@lists.freede |.org |sktop.org QA Contact| |intel-gfx-bugs@lists.freede | |sktop.org CC| |intel-gfx-bugs@lists.freede | |sktop.org Component|libdrm |DRM/Intel
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