From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 107045] [4.18rc2] RX470 dGPU on hybrid laptop freezes screen after use Date: Tue, 28 Aug 2018 16:48:22 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1464107890==" 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 585C96E3B3 for ; Tue, 28 Aug 2018 16:48:22 +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 --===============1464107890== Content-Type: multipart/alternative; boundary="15354749020.e928FE2.4688" Content-Transfer-Encoding: 7bit --15354749020.e928FE2.4688 Date: Tue, 28 Aug 2018 16:48:22 +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=3D107045 --- Comment #20 from taijian@posteo.de --- OK, here is a new twist: upon further investigating this, I came across some weird backlight behaviour that I originally reported here: https://gitlab.gnome.org/GNOME/gnome-settings-daemon/issues/53. However, as= it turns out, this is not a gnome issue but a kernel one. Namely, doing=20 echo X > /sys/class/backlight/intel_backlight/brightness will wake my dGPU, even though it really shouldn't be involved at all (and = does not have a /sys/class/backlight device registered). Furthermore, repeatedly invoking this command before the dGPU has had the chance to go back to sleep will not do anything. Thirdly, this seems to be a very good way to get the system to hard lock up. So, is this an amdgpu issue? A i915 issue? ACPI? where should I take this b= ug report? --=20 You are receiving this mail because: You are the assignee for the bug.= --15354749020.e928FE2.4688 Date: Tue, 28 Aug 2018 16:48:22 +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

Comme= nt # 20 on bug 10704= 5 from taijian@posteo.d= e 
OK, here is a new twist: upon further investigating this, I ca=
me across some
weird backlight behaviour that I originally reported here:
=
https://gitlab.gnome.org/GNOME/gnome-settings-daemon/issues/53. However=
, as it
turns out, this is not a gnome issue but a kernel one.

Namely, doing=20

  echo X > /sys/class/backlight/intel_backlight/brightness

will wake my dGPU, even though it really shouldn't be involved at all (and =
does
not have a /sys/class/backlight device registered). Furthermore, repeatedly
invoking this command before the dGPU has had the chance to go back to sleep
will not do anything. Thirdly, this seems to be a very good way to get the
system to hard lock up.

So, is this an amdgpu issue? A i915 issue? ACPI? where should I take this b=
ug
report?

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