[Bug 105534] amdgpu cannot set 2560x1440 at 60 mode even though monitor,gpu and motherboard support it

Fri Mar 16 00:00:46 UTC 2018

https://bugs.freedesktop.org/show_bug.cgi?id=105534

            Bug ID: 105534
           Summary: amdgpu cannot set 2560x1440 at 60 mode even though
                    monitor,gpu and motherboard support it
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: philipmorant at gmail.com

Hardware:
Raven Ridge 2200G
Asrock A320M-HDV. Manual states max resolution for DVI 1920x1200 at 60 which is
single link, however the board's DVI socket is clearly dual link.
Monex WQHD which is known to work @ 2560x1440 at 60 with reduced blanking since it
works on Intel Haswell with the i915 drivers. This monitor has only one input,
which is dual link DVI. See below for edid-decode output.
Dual channel DVI-D cable.
This is a dual monitor setup. The other monitor is 1920x1080 over VGA/D-SUB.

Software:
ubuntu bionic beaver with linux kernel 4.16.0-rc5+ and
ppa:oibaf/graphics-drivers
/lib/firmware/amdgpu/raven_gpu_info.bin is present (316 bytes).
No customisation of xorg configuration files.

Possibly related bug reports:
https://bugs.freedesktop.org/show_bug.cgi?id=102820
https://bugs.freedesktop.org/show_bug.cgi?id=104412

$ xrandr --newmode "2560x1440_60R"  241.50  2560 2608 2640 2720  1440 1443 1448
1481 +hsync -vsync
$ xrandr --addmode HDMI-A-2  "2560x1440_60R"
$ xrandr --output HDMI-A-2 --mode "2560x1440_60R" --verbose
crtc 1: 2560x1440_60R  59.95 +0+0 "HDMI-A-2"
xrandr: Configure crtc 1 failed
crtc 0: disable
crtc 1: disable
crtc 2: disable
crtc 3: disable
screen 0: revert
crtc 0: revert
crtc 1: revert
crtc 2: revert
crtc 3: revert
$ xrandr
Screen 0: minimum 320 x 200, current 4480 x 1440, maximum 16384 x 16384
DisplayPort-0 connected primary 1920x1080+2560+360 (normal left inverted right
x axis y axis) 478mm x 269mm
   1920x1080     60.00*+
   1680x1050     59.95  
   1280x1024     75.02  
   1440x900      74.98    59.89  
   1280x960      60.00  
   1280x800      59.81  
   1152x864      75.00  
   1280x720      60.00  
   1152x720      59.97  
   1024x768      75.03    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   640x480       75.00    72.81    66.67    59.94  
   720x400       70.08  
HDMI-A-0 disconnected (normal left inverted right x axis y axis)
HDMI-A-1 disconnected (normal left inverted right x axis y axis)
HDMI-A-2 connected (normal left inverted right x axis y axis)
   2560x1440_60R  59.95  

I've been running with drm.debug=0xf and searching log files but am unable to
find any helpful error message.

$ edid-decode /sys/class/drm/card0-HDMI-A-3/edid
Extracted contents:
header:          00 ff ff ff ff ff ff 00
serial number:   12 ed fa 00 00 00 00 00 28 15
version:         01 03
basic params:    a5 3c 22 78 22
chroma info:     6f b1 a7 55 4c 9e 25 0c 50 54
established:     00 00 00
standard:        01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
descriptor 1:    56 5e 00 a0 a0 a0 29 50 30 20 35 00 55 50 21 00 00 1a
descriptor 2:    00 00 00 fc 00 51 48 44 32 37 30 0a 20 20 20 20 20 20
descriptor 3:    00 00 00 fc 00 0a 20 20 20 20 20 20 20 20 20 20 20 20
descriptor 4:    00 00 00 fc 00 0a 20 20 20 20 20 20 20 20 20 20 20 20
extensions:      00
checksum:        8a

Manufacturer: DWM Model fa Serial Number 0
Made week 40 of 2011
EDID version: 1.3
Digital display
DFP 1.x compatible TMDS
Maximum image size: 60 cm x 34 cm
Gamma: 2.20
DPMS levels: Off
Supported color formats: RGB 4:4:4
First detailed timing is preferred timing
Established timings supported:
Standard timings supported:
Detailed mode: Clock 241.500 MHz, 597 mm x 336 mm
               2560 2608 2640 2720 hborder 0
               1440 1443 1448 1481 vborder 0
               +hsync -vsync 
Monitor name: QHD270
Checksum: 0x8a (valid)
EDID block does NOT conform to EDID 1.3!
        Digital display field contains garbage: 24
        Missing monitor ranges

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