From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 112008] eDP -> Dual Channel LVDS bridge unable to accept any modelines: Corrupt display! Date: Tue, 15 Oct 2019 02:52:25 +0000 Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0631769417==" 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 C76FB6E1C4 for ; Tue, 15 Oct 2019 02:52:25 +0000 (UTC) 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 --===============0631769417== Content-Type: multipart/alternative; boundary="15711079451.f5ccBc.1763" Content-Transfer-Encoding: 7bit --15711079451.f5ccBc.1763 Date: Tue, 15 Oct 2019 02:52:25 +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=3D112008 Bug ID: 112008 Summary: eDP -> Dual Channel LVDS bridge unable to accept any modelines: Corrupt display! Product: DRI Version: DRI git Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: major Priority: not set Component: DRM/AMDgpu Assignee: dri-devel@lists.freedesktop.org Reporter: Babblebones@gmail.com Created attachment 145745 --> https://bugs.freedesktop.org/attachment.cgi?id=3D145745&action=3Dedit kernel5.3-drm.debug=3D0xe At my wits end on this bug. My bisecting have proven useless and I wanted to get some help from you guys. Several reverted regressions reproduce the same behavior along the way and I have spent hours sifting and booting to see wh= ere it's at. The short of it is that the monitor in my HP laptop boots to a 640x480 mode= line on mainline kernels newer than 4.17-rc3. Would not be a colossal problem, as I can just force a working modeline from userspace, if it didn't mean without the modeset the bridge utterly scrambl= es the display by lining up 640x480 as a wrapping 2D length in the very top of= my screen as a jumble of colors. The issue is GPU independent but is AMD related. Both W7170M and WX7100 affected. Somewhere after kernel 4.17-rc3 the the rodeo begins. My dmesg is probably going to be much much more helpful when it comes to debugging and I will GLADLY test any kernel patches if you need more info & detailed kernel/ custom dmesg dumps. Notable stuff in the dump: [ 4.773991] [drm:amdgpu_vm_init [amdgpu]] VM update mode is SDMA [ 4.774149] [drm:drm_client_modeset_probe]=20 [ 4.774156] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:59:eDP-1] [ 4.774159] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:59:eDP-1] status updated from unknown to connected [ 4.774268] [drm:update_stream_scaling_settings [amdgpu]] Destination Rectangle x:0 y:0 width:640 height:480 [ 4.774278] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:59:eDP-1] probed modes : [ 4.774282] [drm:drm_mode_debug_printmodeline] Modeline "640x480": 60 25= 175 640 656 752 800 480 490 492 525 0x40 0xa [ 4.774284] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:63:DP-1] --=20 You are receiving this mail because: You are the assignee for the bug.= --15711079451.f5ccBc.1763 Date: Tue, 15 Oct 2019 02:52:25 +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
Bug ID 112008
Summary eDP -> Dual Channel LVDS bridge unable to accept any model= ines: Corrupt display!
Product DRI
Version DRI git
Hardware x86-64 (AMD64)
OS Linux (All)
Status NEW
Severity major
Priority not set
Component DRM/AMDgpu
Assignee dri-devel@lists.freedesktop.org
Reporter Babblebones@gmail.com 

Created attachment 145=
745 [details]
kernel5.3-drm.debug=3D0xe

At my wits end on this bug. My bisecting have proven useless and I wanted to
get some help from you guys. Several reverted regressions reproduce the same
behavior along the way and I have spent hours sifting and booting to see wh=
ere
it's at.

The short of it is that the monitor in my HP laptop boots to a 640x480 mode=
line
on mainline kernels newer than 4.17-rc3.
Would not be a colossal problem, as I can just force a working modeline from
userspace, if it didn't mean without the modeset the bridge utterly scrambl=
es
the display by lining up 640x480 as a wrapping 2D length in the very top of=
 my
screen as a jumble of colors.

The issue is GPU independent but is AMD related. Both W7170M and WX7100
affected.
Somewhere after kernel 4.17-rc3 the the rodeo begins.
My dmesg is probably going to be much much more helpful when it comes to
debugging and I will GLADLY test any kernel patches if you need more info &=
amp;
detailed kernel/ custom dmesg dumps.

Notable stuff in the dump:

[    4.773991] [drm:amdgpu_vm_init [amdgpu]] VM update mode is SDMA
[    4.774149] [drm:drm_client_modeset_probe]=20
[    4.774156] [drm:drm_helper_probe_single_connector_modes]
[CONNECTOR:59:eDP-1]
[    4.774159] [drm:drm_helper_probe_single_connector_modes]
[CONNECTOR:59:eDP-1] status updated from unknown to connected
[    4.774268] [drm:update_stream_scaling_settings [amdgpu]] Destination
Rectangle x:0  y:0  width:640  height:480
[    4.774278] [drm:drm_helper_probe_single_connector_modes]
[CONNECTOR:59:eDP-1] probed modes :
[    4.774282] [drm:drm_mode_debug_printmodeline] Modeline "640x480&qu=
ot;: 60 25175
640 656 752 800 480 490 492 525 0x40 0xa
[    4.774284] [drm:drm_helper_probe_single_connector_modes]
[CONNECTOR:63:DP-1]

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