From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 93826] 2560x1440 @144Hz graphic glitches and bad refresh rate Date: Sun, 09 Jul 2017 20:25:08 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1330124167==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [IPv6:2610:10:20:722:a800:ff:fe98:4b55]) by gabe.freedesktop.org (Postfix) with ESMTP id 3594089CD7 for ; Sun, 9 Jul 2017 20:25:08 +0000 (UTC) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============1330124167== Content-Type: multipart/alternative; boundary="14996319070.BBfE.27170"; charset="UTF-8" --14996319070.BBfE.27170 Date: Sun, 9 Jul 2017 20:25:07 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated https://bugs.freedesktop.org/show_bug.cgi?id=3D93826 --- Comment #75 from Emma Stott --- (In reply to kees.aarts1 from comment #74) > I have come here since my first git bisect learned me that commit > 09be4a5219610a6fae3215d4f51f948d6f5d2609 causes problems on my system. I > have a RX 460 and LG 38UC99-W and 3840x1600 @ 60hz gives no problem >=20 > Running at 75hz (freesync) worked fine on 4.12-rc2 (I used 4.12 since at > 4.11 or lower I could not use the displayport at all and was limited to 3= 0hz > via hdmi). But rc3 and up gave me flickering at the lowest +-7cm of the > screen if something changes on the screen. A git bisect brought me to the > commit mentioned above. >=20 > echo high > /sys/class/drm/card0/device/power_dpm_force_performance_level > fixes the problem on 4.12-rc6 > echo low > /sys/class/drm/card0/device/power_dpm_force_performance_level > also fixes the problem (did not expect that) > echo auto > /sys/class/drm/card0/device/power_dpm_force_performance_level > gives flickering.. I'm having exactly the same problem as described by kees.aarts1. - CPU: AMD Ryzen 7 1700X=20 - GPU: ASUS RX 470 (4 GB) - Monitor: Acer XR341CK monitor, 3440x1440 @ 75 Hz, with support for Adapti= ve Sync/FreeSync - uname -a: Linux winters-pc 4.11.9-1-ARCH #1 SMP PREEMPT Wed Jul 5 18:23:08 CEST 2017 x86_64 GNU/Linux When I set the display to 75 Hz I start to experience flicker primarily in = the bottom third of the display. The issue goes away if I set the refresh rate = to 60 or lower. This issue first occured with with kernel 4.11.4. I'm now on 4.11.9 and it's still happening. Running the command kees.aarts1 suggested resolves the issue until the next reboot: > echo high > /sys/class/drm/card0/device/power_dpm_force_performance_level I'm a bit of a Linux newbie so I apologise if I've missed anything that mig= ht be helpful. Please let me know what commands/logs/etc. you'd like me to gat= her and I'll be happy to do so. Thanks! --=20 You are receiving this mail because: You are the assignee for the bug.= --14996319070.BBfE.27170 Date: Sun, 9 Jul 2017 20:25:07 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated

Commen= t # 75 on bug 93826<= /a> from Emma Stott 
(In reply to kees.aarts1 from comment #74)
> I have come here since my first git bisect learn=
ed me that commit
> 09be4a5219610a6fae3215d4f51f948d6f5d2609 causes problems on my system.=
 I
> have a RX 460 and LG 38UC99-W and 3840x1600 @ 60hz gives no problem
>=20
> Running at 75hz (freesync) worked fine on 4.12-rc2 (I used 4.12 since =
at
> 4.11 or lower I could not use the displayport at all and was limited t=
o 30hz
> via hdmi). But rc3 and up gave me flickering at the lowest +-7cm of the
> screen if something changes on the screen. A git bisect brought me to =
the
> commit mentioned above.
>=20
> echo high > /sys/class/drm/card0/device/power_dpm_force_performance=
_level
> fixes the problem on 4.12-rc6
> echo low > /sys/class/drm/card0/device/power_dpm_force_performance_=
level
> also fixes the problem (did not expect that)
> echo auto > /sys/class/drm/card0/device/power_dpm_force_performance=
_level
> gives flickering..

I'm having exactly the same problem as described by kees.aarts1.

- CPU: AMD Ryzen 7 1700X=20
- GPU: ASUS RX 470 (4 GB)
- Monitor: Acer XR341CK monitor, 3440x1440 @ 75 Hz, with support for Ad=
aptive
Sync/FreeSync
- uname -a: Linux winters-pc 4.11.9-1-ARCH #1 SMP PREEMPT Wed Jul 5 18:23:08
CEST 2017 x86_64 GNU/Linux

When I set the display to 75 Hz I start to experience flicker primarily in =
the
bottom third of the display. The issue goes away if I set the refresh rate =
to
60 or lower.

This issue first occured with with kernel 4.11.4. I'm now on 4.11.9 and it's
still happening.

Running the command kees.aarts1 suggested resolves the issue until the next
reboot:
> echo high > /sys/class/drm/card0/device/power=
_dpm_force_performance_level

I'm a bit of a Linux newbie so I apologise if I've missed anything that mig=
ht
be helpful. Please let me know what commands/logs/etc. you'd like me to gat=
her
and I'll be happy to do so.

Thanks!

You are receiving this mail because:
  • You are the assignee for the bug.
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