[Bug 100414] New: Refresh rate changes constantly with ONKYO AVR

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100414

            Bug ID: 100414
           Summary: Refresh rate changes constantly with ONKYO AVR
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: oliver.tali at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 130481
  --> https://bugs.freedesktop.org/attachment.cgi?id=130481&action=edit
dmesg was not showing full info with drm.debug=0x1e so kern.log instead

Hi,

There is a regression with my HW combination that maybe is somewhat exotic but
I dont have a good remedy other than running the 4.2.8 kernel from 2015, so
here's the bug report.

I have a Gigabyte C1037U-EU board with Celeron 1037U/. When it is connected via
HDMI to my Onkyo AVR HT-R380 and then to my Samsung UE55F6100 there is constant
refresh rate flickering at 60/50hz. With 24hz it's more stable. When connecting
the HDMI directly to the TV there is no issue at any refresh rates (all at
1080p). Replaced all cables to rule out issues there.

Problem started with kernel 4.3.0-rc1, there are no problems with 4.2.8.
Reporting this now with the following log that shows 3 boot/reboot cycles with
kernels 4.11.0-994-generic (drm-tip), 4.3.0-040300rc1-generic and
4.2.8-040208-generic all from the ubuntu mainline ppa. Booted with
video=HDMI-A-1:1920x1080 at 60D
drm_kms_helper.edid_firmware=HDMI-A-1:edid/edid.bin drm.debug=0x1e. The EDID is
from the Onkyo AVR as a possible workaround but hasnt helped with this issue.

The first 2 kernels exhibit continuous screen refresh rate changes starting
already at the Ubuntu bootup splash and only the last 4.2.8 boot does not have
this symptom.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20170327/b80fd48a/attachment-0001.html>