| Bug ID | 108997 |
|---|---|
| Summary | RX460: Some Resolution-Refresh Combinations Unavailable when Connected via DisplayPort |
| Product | DRI |
| Version | unspecified |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | DRM/AMDgpu |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | jeffbai@aosc.io |
- Xorg Server version: 1.20.3
- XRandR version: 1.5.0
- Xf86-Video-AMDGPU version: 18.0.1
- Kernel parameters: root=UUID=dfd3d587-145e-4c01-af04-a3e24c59e95c rw quiet rw
rd.auto rd.auto=1 splash vfio-pci.ids=10de:1c03,1022:145f,1022:1457
modprobe.blacklist=nouveau iommu=pt amd_iommu=on kvm-amd.avic=1
kvm-amd.nested=1 clocksource=tsc kvm.ignore_msrs=1
pcie_acs_override=multifunction rd.driver.pre=vfio-pci video=efifb:off
--------
Xorg.conf:
Section "Device"
Identifier "Device 0"
Driver "amdgpu"
VendorName "Advanced Micro Devices, Inc."
BusID "PCI:34:0:0"
Option "IgnoreEDID" "true"
Option "UseEDID" "false"
EndSection
Section "Monitor"
Identifier "Monitor 0"
VendorName "SAMSUNG"
ModelName "900SL"
Option "UseEDID" "false"
Option "UseEDIDFreqs" "false"
Option "DDC" "false"
HorizSync 30.0 - 96.0
VertRefresh 50.0 - 100.0
Modeline "1600x1200_76.00" 207.50 1600 1720 1888 2176 1200
1203 1207 1256 -hsync +vsync
Option "PreferredMode" "1600x1200_76.00"
EndSection
--------
While connecting my XFX Radeon RX460 Slim to a Samsung 900SL CRT monitor via a
DisplayPort to VGA converter cable, 1600x1200@76Hz is not available, despite
the factory specs...
1600 x 1200 / 76 Hz
1600 x 1200 / 70 Hz
1600 x 1200 / 65 Hz
1280 x 1024 / 89 Hz
1024 x 768 / 119 Hz
800 x 600 / 152 Hz
640 x 480 / 160 Hz
When attempting to create a new custom mode...
mingcongbai@NetVista [ / ] $ cvt 1600 1200 76
# 1600x1200 75.92 Hz (CVT) hsync: 95.36 kHz; pclk: 207.50 MHz
Modeline "1600x1200_76.00" 207.50 1600 1720 1888 2176 1200 1203 1207 1256
-hsync +vsync
mingcongbai@NetVista [ / ] $ xrandr --newmode "1600x1200_76.00" 207.50 1600
1720 1888 2176 1200 1203 1207 1256 -hsync +vsync
mingcongbai@NetVista [ / ] $ xrandr --addmode DisplayPort-0 "1600x1200_76.00"
mingcongbai@NetVista [ / ] $ xrandr --output DisplayPort-0 --mode
"1600x1200_76.00"
xrandr: Configure crtc 0 failed
I have an NVIDIA GeForce GTX1060 passed through to a Windows 10 VM, connected
via a DisplayPort to VGA, and VGA to BNC 5-pin connector, in this case,
1600x1200 is available and displays a correct image.
I have also tried to connect the RX460 with the DP-VGA-BNC cable, which yielded
the same result.
You are receiving this mail because:
- You are the assignee for the bug.
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