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#1 Yesterday 03:39:27

afader
Member
Registered: 2013-09-12
Posts: 207

Can Radeon RX 9070 work DP-HDMI 4K LG TV OLED 120hz in Gnome Wayland?

I recently finally have an AMD card, 9070. It has 2 Display Ports and 1 HDMI. In Windows, it can drive the LG TV OLED at 4k, 120hz, 10-bit color, HDR. In Gnome Wayland I do not have that. I tried "video=DP-3:3840x2160@120 amdgpu.dcfeaturemask=0x22" and this does successfully create a 120hz option but it's no signal.

I can hook the TV up directly HDMI-HDMI or HDMI-DP thru CableMatters adapter. I figured I'd have better luck with the adapter but neither works in Linux.

[    0.006715] RAMDISK: [mem 0x5f8fb000-0x63c54fff]
[    0.006884] ACPI: VFCT 0x000000007905E000 00E684 (v01 ALASKA A M I    00000001 AMD  33504F47)
[    2.190625] NET: Registered PF_NETLINK/PF_ROUTE protocol family
[    2.301331] pci 0000:01:00.0: 126.016 Gb/s available PCIe bandwidth, limited by 8.0 GT/s PCIe x16 link at 0000:00:01.0 (capable of 504.112 Gb/s with 32.0 GT/s PCIe x16 link)
[    2.301980] pci 0000:03:00.0: 126.016 Gb/s available PCIe bandwidth, limited by 8.0 GT/s PCIe x16 link at 0000:00:01.0 (capable of 504.112 Gb/s with 32.0 GT/s PCIe x16 link)
[    2.302678] pci 0000:06:00.0: 15.752 Gb/s available PCIe bandwidth, limited by 8.0 GT/s PCIe x2 link at 0000:00:1d.0 (capable of 31.504 Gb/s with 8.0 GT/s PCIe x4 link)
[    2.304772] ACPI: PCI: Interrupt link LNKA configured for IRQ 0
[    2.304857] ACPI: PCI: Interrupt link LNKB configured for IRQ 1
[    2.304938] ACPI: PCI: Interrupt link LNKC configured for IRQ 0
[    2.305025] ACPI: PCI: Interrupt link LNKD configured for IRQ 0
[    2.305109] ACPI: PCI: Interrupt link LNKE configured for IRQ 0
[    2.305190] ACPI: PCI: Interrupt link LNKF configured for IRQ 0
[    2.305272] ACPI: PCI: Interrupt link LNKG configured for IRQ 0
[    2.305353] ACPI: PCI: Interrupt link LNKH configured for IRQ 0
[    2.573414] ACPI: bus type drm_connector registered
[    2.581924] simple-framebuffer simple-framebuffer.0: [drm] Registered 1 planes with drm panic
[    2.581935] [drm] Initialized simpledrm 1.0.0 for simple-framebuffer.0 on minor 0
[    2.583585] simple-framebuffer simple-framebuffer.0: [drm] fb0: simpledrmdrmfb frame buffer device
[    2.878699] ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[    2.878734] ata5: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[    2.878781] ata6: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[    2.878949] ata3: SATA link down (SStatus 4 SControl 300)
[    2.879022] ata4: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[    2.879098] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[    2.879185] ata5.00: supports DRM functions and may not be fully accessible
[    2.879892] ata4.00: supports DRM functions and may not be fully accessible
[    2.881375] ata4.00: supports DRM functions and may not be fully accessible
[    2.883508] ata5.00: supports DRM functions and may not be fully accessible
[    6.910474] amdgpu: Virtual CRAT table created for CPU
[    6.910486] amdgpu: Topology: Add CPU node
[    6.910571] amdgpu 0000:03:00.0: enabling device (0006 -> 0007)
[    6.910644] amdgpu 0000:03:00.0: initializing kernel modesetting (IP DISCOVERY 0x1002:0x7550 0x1849:0x5406 0xC3).
[    6.910654] amdgpu 0000:03:00.0: register mmio base: 0x7F900000
[    6.910655] amdgpu 0000:03:00.0: register mmio size: 524288
[    6.913771] amdgpu 0000:03:00.0: detected ip block number 0 <common_v1_0_0> (soc24_common)
[    6.913773] amdgpu 0000:03:00.0: detected ip block number 1 <gmc_v12_0_0> (gmc_v12_0)
[    6.913775] amdgpu 0000:03:00.0: detected ip block number 2 <ih_v7_0_0> (ih_v7_0)
[    6.913776] amdgpu 0000:03:00.0: detected ip block number 3 <psp_v14_0_0> (psp)
[    6.913777] amdgpu 0000:03:00.0: detected ip block number 4 <smu_v14_0_0> (smu)
[    6.913778] amdgpu 0000:03:00.0: detected ip block number 5 <dce_v1_0_0> (dm)
[    6.913779] amdgpu 0000:03:00.0: detected ip block number 6 <gfx_v12_0_0> (gfx_v12_0)
[    6.913780] amdgpu 0000:03:00.0: detected ip block number 7 <sdma_v7_0_0> (sdma_v7_0)
[    6.913781] amdgpu 0000:03:00.0: detected ip block number 8 <vcn_v5_0_0> (vcn_v5_0_0)
[    6.913782] amdgpu 0000:03:00.0: detected ip block number 9 <jpeg_v5_0_0> (jpeg_v5_0_0)
[    6.913783] amdgpu 0000:03:00.0: detected ip block number 10 <mes_v12_0_0> (mes_v12_0)
[    6.913801] amdgpu 0000:03:00.0: Fetched VBIOS from VFCT
[    6.913804] amdgpu 0000:03:00.0: [drm] ATOM BIOS: 113-APM7606CL-103, build: 00145946, ver: 023.008.000.068.000001, 2025/04/01
[    6.955088] amdgpu 0000:03:00.0: vgaarb: deactivate vga console
[    6.955090] amdgpu 0000:03:00.0: Trusted Memory Zone (TMZ) feature not supported
[    6.955110] amdgpu 0000:03:00.0: MEM ECC is not presented.
[    6.955111] amdgpu 0000:03:00.0: SRAM ECC is not presented.
[    6.955121] amdgpu 0000:03:00.0: vm size is 262144 GB, 4 levels, block size is 9-bit, fragment size is 9-bit
[    6.955126] amdgpu 0000:03:00.0: VRAM: 16304M 0x0000008000000000 - 0x00000083FAFFFFFF (16304M used)
[    6.955127] amdgpu 0000:03:00.0: GART: 512M 0x0000000000000000 - 0x000000001FFFFFFF
[    6.955131] amdgpu 0000:03:00.0: [drm] Detected VRAM RAM=16304M, BAR=16384M
[    6.955132] amdgpu 0000:03:00.0: [drm] RAM width 256bits GDDR6
[    6.955219] amdgpu 0000:03:00.0:  16304M of VRAM memory ready
[    6.955221] amdgpu 0000:03:00.0:  15965M of GTT memory ready.
[    6.955253] amdgpu 0000:03:00.0: [drm] GART: num cpu pages 131072, num gpu pages 131072
[    6.955427] amdgpu 0000:03:00.0: [drm] PCIE GART of 512M enabled (table at 0x00000083DAB00000).
[    6.955999] amdgpu 0000:03:00.0: [drm] Loading DMUB firmware via PSP: version=0x0A003A00
[    6.956299] amdgpu 0000:03:00.0: [VCN instance 0] Found VCN firmware Version ENC: 1.12 DEC: 9 VEP: 0 Revision: 26
[    6.956404] amdgpu 0000:03:00.0: MES: vmid_mask_mmhub 0x0000ff00, vmid_mask_gfxhub 0x0000ff00
[    6.956406] amdgpu 0000:03:00.0: MES: gfx_hqd_mask 0x000000fe, compute_hqd_mask 0x0000000c, sdma_hqd_mask 0x000000fc
[    7.191709] amdgpu 0000:03:00.0: RAP: optional rap ta ucode is not available
[    7.191711] amdgpu 0000:03:00.0: SECUREDISPLAY: optional securedisplay ta ucode is not available
[    7.191737] amdgpu 0000:03:00.0: smu driver if version = 0x0000002e, smu fw if version = 0x00000033, smu fw program = 0, smu fw version = 0x00684c00 (104.76.0)
[    7.225544] amdgpu 0000:03:00.0: SMU is initialized successfully!
[    7.225901] amdgpu 0000:03:00.0: [drm] Display Core v3.2.378 initialized on DCN 4.0.1
[    7.225903] amdgpu 0000:03:00.0: [drm] DP-HDMI FRL PCON supported
[    7.230187] amdgpu 0000:03:00.0: [drm] DMUB hardware initialized: version=0x0A003A00
[    7.301279] amdgpu 0000:03:00.0: [drm] DP-1: PSR support 0, DC PSR ver -1, sink PSR ver 0 DPCD caps 0x0 su_y_granularity 0
[    7.494845] amdgpu 0000:03:00.0: [drm] DP-2: PSR support 0, DC PSR ver -1, sink PSR ver 0 DPCD caps 0x0 su_y_granularity 0
[    7.695844] amdgpu 0000:03:00.0: [drm] DP-3: PSR support 0, DC PSR ver -1, sink PSR ver 0 DPCD caps 0x0 su_y_granularity 0
[    7.695868] amdgpu 0000:03:00.0: [drm] HDMI-A-1: PSR support 0, DC PSR ver -1, sink PSR ver 0 DPCD caps 0x0 su_y_granularity 0
[    7.696556] amdgpu 0000:03:00.0: program CP_MES_CNTL : 0x4000000
[    7.696559] amdgpu 0000:03:00.0: program CP_MES_CNTL : 0xc000000
[    7.710505] amdgpu: Virtual CRAT table created for GPU
[    7.710609] amdgpu: Topology: Add GPU node [0x1002:0x7550]
[    7.710617] amdgpu 0000:03:00.0: SE 4, SH per SE 2, CU per SH 8, active_cu_number 56
[    7.710619] amdgpu 0000:03:00.0: ring gfx_0.0.0 uses VM inv eng 0 on hub 0
[    7.710620] amdgpu 0000:03:00.0: ring comp_1.0.0 uses VM inv eng 1 on hub 0
[    7.710621] amdgpu 0000:03:00.0: ring comp_1.1.0 uses VM inv eng 4 on hub 0
[    7.710622] amdgpu 0000:03:00.0: ring comp_1.0.1 uses VM inv eng 7 on hub 0
[    7.710622] amdgpu 0000:03:00.0: ring comp_1.1.1 uses VM inv eng 8 on hub 0
[    7.710623] amdgpu 0000:03:00.0: ring sdma0 uses VM inv eng 9 on hub 0
[    7.710623] amdgpu 0000:03:00.0: ring sdma1 uses VM inv eng 10 on hub 0
[    7.710624] amdgpu 0000:03:00.0: ring vcn_unified_0 uses VM inv eng 0 on hub 8
[    7.710625] amdgpu 0000:03:00.0: ring jpeg_dec uses VM inv eng 1 on hub 8
[    7.749014] amdgpu: HMM registered 16304MB device memory
[    7.751589] amdgpu 0000:03:00.0: Using BACO for runtime pm
[    7.752031] amdgpu 0000:03:00.0: [drm] Registered 4 planes with drm panic
[    7.762582] [drm] Initialized amdgpu 3.64.0 for 0000:03:00.0 on minor 1
[    7.802377] fbcon: amdgpudrmfb (fb0) is primary device
[    7.803805] [drm] pre_validate_dsc:1667 MST_DSC dsc precompute is not needed
[    8.093311] amdgpu 0000:03:00.0: [drm] fb0: amdgpudrmfb frame buffer device
[   16.616922] systemd[1]: Listening on udev Varlink Socket.
[   16.634238] systemd[1]: Load Kernel Module drm skipped, unmet condition check ConditionKernelModuleLoaded=!drm
[   17.037075] Adding 16348156k swap on /dev/zram0.  Priority:32767 extents:1 across:16348156k SSDsc
[   17.824649] i915 0000:00:02.0: [drm] Found cometlake (device ID 9bc5) integrated display version 9.00 stepping N/A
[   17.824882] i915 0000:00:02.0: [drm] VT-d active for gfx access
[   17.824926] i915 0000:00:02.0: [drm] Using Transparent Hugepages
[   17.830419] i915 0000:00:02.0: [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_04.bin (v1.4)
[   17.831005] i915 0000:00:02.0: [drm] Registered 3 planes with drm panic
[   17.831007] [drm] Initialized i915 1.6.0 for 0000:00:02.0 on minor 0
[   17.858153] i915 0000:00:02.0: [drm] Cannot find any crtc or sizes
[   17.871366] i915 0000:00:02.0: [drm] Cannot find any crtc or sizes
[   20.677700] Initializing XFRM netlink socket
[   22.344972] e1000e 0000:00:1f.6 eno1: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None

sudo cat /sys/kernel/debug/dri/1/DP-3/dp_dsc_fec_support
FEC_Sink_Support: yes
DSC_Sink_Support: no

 sudo cat /sys/class/drm/card1-DP-3/edid | edid-decode
edid-decode (hex):

00 ff ff ff ff ff ff 00 1e 6d 01 00 01 01 01 01
01 1b 01 03 80 a0 5a 78 0a ee 91 a3 54 4c 99 26
0f 50 54 a1 08 00 31 40 45 40 61 40 71 40 81 80
01 01 01 01 01 01 08 e8 00 30 f2 70 5a 80 b0 58
8a 00 40 84 63 00 00 1e 02 3a 80 18 71 38 2d 40
58 2c 45 00 40 84 63 00 00 1e 00 00 00 fd 00 3a
79 1e 88 3c 00 0a 20 20 20 20 20 20 00 00 00 fc
00 4c 47 20 54 56 0a 20 20 20 20 20 20 20 01 63

02 03 60 f1 5a 61 60 10 1f 66 65 04 13 05 14 03
02 12 20 21 22 15 01 5d 5e 5f 62 63 64 3f 40 2f
09 57 07 15 07 50 57 07 01 3d 06 c0 67 04 03 6e
03 0c 00 20 00 b8 3c 20 00 80 01 02 03 04 67 d8
5d c4 01 78 80 03 e2 00 cf e3 05 c0 00 e3 06 0d
01 e2 0f 33 eb 01 46 d0 00 26 0a 09 75 80 5b 6c
66 21 50 b0 51 00 1b 30 40 70 36 00 40 84 63 00
00 1e 00 00 00 00 00 00 00 00 00 00 00 00 00 f1

----------------

Block 0, Base EDID:
  EDID Structure Version & Revision: 1.3
  Vendor & Product Identification:
    Manufacturer: GSM
    Model: 1
    Serial Number: 16843009 (0x01010101)
    Made in: week 1 of 2017
  Basic Display Parameters & Features:
    Digital display
    Maximum image size: 160 cm x 90 cm
    Gamma: 2.20
    RGB color display
    First detailed timing is the preferred timing
  Color Characteristics:
    Red  : 0.6396, 0.3300
    Green: 0.2998, 0.5996
    Blue : 0.1503, 0.0595
    White: 0.3125, 0.3291
  Established Timings I & II:
    IBM     :   720x400    70.081663 Hz   9:5     31.467 kHz     28.320000 MHz
    DMT 0x04:   640x480    59.940476 Hz   4:3     31.469 kHz     25.175000 MHz
    DMT 0x09:   800x600    60.316541 Hz   4:3     37.879 kHz     40.000000 MHz
    DMT 0x10:  1024x768    60.003840 Hz   4:3     48.363 kHz     65.000000 MHz
  Standard Timings:
    DMT 0x04:   640x480    59.940476 Hz   4:3     31.469 kHz     25.175000 MHz
    DMT 0x09:   800x600    60.316541 Hz   4:3     37.879 kHz     40.000000 MHz
    DMT 0x10:  1024x768    60.003840 Hz   4:3     48.363 kHz     65.000000 MHz
    GTF     :  1152x864    60.000000 Hz   4:3     53.700 kHz     81.624000 MHz
    DMT 0x23:  1280x1024   60.019740 Hz   5:4     63.981 kHz    108.000000 MHz
  Detailed Timing Descriptors:
    DTD 1:  3840x2160   60.000000 Hz  16:9    135.000 kHz    594.000000 MHz (1600 mm x 900 mm)
                 Hfront  176 Hsync  88 Hback  296 Hpol P
                 Vfront    8 Vsync  10 Vback   72 Vpol P
    DTD 2:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz (1600 mm x 900 mm)
                 Hfront   88 Hsync  44 Hback  148 Hpol P
                 Vfront    4 Vsync   5 Vback   36 Vpol P
    Display Range Limits:
      Monitor ranges (GTF): 58-121 Hz V, 30-136 kHz H, max dotclock 600 MHz
    Display Product Name: 'LG TV'
  Extension blocks: 1
Checksum: 0x63

----------------

Block 1, CTA-861 Extension Block:
  Revision: 3
  Underscans IT Video Formats by default
  Basic audio support
  Supports YCbCr 4:4:4
  Supports YCbCr 4:2:2
  Native detailed modes: 1
  Video Data Block:
    VIC  97:  3840x2160   60.000000 Hz  16:9    135.000 kHz    594.000000 MHz
    VIC  96:  3840x2160   50.000000 Hz  16:9    112.500 kHz    594.000000 MHz
    VIC  16:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz
    VIC  31:  1920x1080   50.000000 Hz  16:9     56.250 kHz    148.500000 MHz
    VIC 102:  4096x2160   60.000000 Hz 256:135  135.000 kHz    594.000000 MHz
    VIC 101:  4096x2160   50.000000 Hz 256:135  112.500 kHz    594.000000 MHz
    VIC   4:  1280x720    60.000000 Hz  16:9     45.000 kHz     74.250000 MHz
    VIC  19:  1280x720    50.000000 Hz  16:9     37.500 kHz     74.250000 MHz
    VIC   5:  1920x1080i  60.000000 Hz  16:9     33.750 kHz     74.250000 MHz
    VIC  20:  1920x1080i  50.000000 Hz  16:9     28.125 kHz     74.250000 MHz
    VIC   3:   720x480    59.940060 Hz  16:9     31.469 kHz     27.000000 MHz
    VIC   2:   720x480    59.940060 Hz   4:3     31.469 kHz     27.000000 MHz
    VIC  18:   720x576    50.000000 Hz  16:9     31.250 kHz     27.000000 MHz
    VIC  32:  1920x1080   24.000000 Hz  16:9     27.000 kHz     74.250000 MHz
    VIC  33:  1920x1080   25.000000 Hz  16:9     28.125 kHz     74.250000 MHz
    VIC  34:  1920x1080   30.000000 Hz  16:9     33.750 kHz     74.250000 MHz
    VIC  21:  1440x576i   50.000000 Hz   4:3     15.625 kHz     27.000000 MHz
    VIC   1:   640x480    59.940476 Hz   4:3     31.469 kHz     25.175000 MHz
    VIC  93:  3840x2160   24.000000 Hz  16:9     54.000 kHz    297.000000 MHz
    VIC  94:  3840x2160   25.000000 Hz  16:9     56.250 kHz    297.000000 MHz
    VIC  95:  3840x2160   30.000000 Hz  16:9     67.500 kHz    297.000000 MHz
    VIC  98:  4096x2160   24.000000 Hz 256:135   54.000 kHz    297.000000 MHz
    VIC  99:  4096x2160   25.000000 Hz 256:135   56.250 kHz    297.000000 MHz
    VIC 100:  4096x2160   30.000000 Hz 256:135   67.500 kHz    297.000000 MHz
    VIC  63:  1920x1080  120.000000 Hz  16:9    135.000 kHz    297.000000 MHz
    VIC  64:  1920x1080  100.000000 Hz  16:9    112.500 kHz    297.000000 MHz
  Audio Data Block:
    Linear PCM:
      Max channels: 2
      Supported sample rates (kHz): 192 96 48 44.1 32
      Supported sample sizes (bits): 24 20 16
    AC-3:
      Max channels: 6
      Supported sample rates (kHz): 48 44.1 32
      Maximum bit rate: 640 kb/s
    Enhanced AC-3 (DD+):
      Max channels: 8
      Supported sample rates (kHz): 48 44.1 32
      Supports Joint Object Coding
    DTS:
      Max channels: 6
      Supported sample rates (kHz): 48 44.1
      Maximum bit rate: 1536 kb/s
    MAT (MLP):
      Max channels: 8
      Supported sample rates (kHz): 48
      Supports Dolby TrueHD, object audio PCM and channel-based PCM
      Hash calculation not required for object audio PCM or channel-based PCM
  Vendor-Specific Data Block (HDMI), OUI 00-0C-03:
    Source physical address: 2.0.0.0
    Supports_AI
    DC_36bit
    DC_30bit
    DC_Y444
    Maximum TMDS clock: 300 MHz
    Extended HDMI video details:
      HDMI VICs:
        HDMI VIC 1:  3840x2160   30.000000 Hz  16:9     67.500 kHz    297.000000 MHz
        HDMI VIC 2:  3840x2160   25.000000 Hz  16:9     56.250 kHz    297.000000 MHz
        HDMI VIC 3:  3840x2160   24.000000 Hz  16:9     54.000 kHz    297.000000 MHz
        HDMI VIC 4:  4096x2160   24.000000 Hz 256:135   54.000 kHz    297.000000 MHz
  Vendor-Specific Data Block (HDMI Forum), OUI C4-5D-D8:
    Version: 1
    Maximum TMDS Character Rate: 600 MHz
    SCDC Present
    Supports 12-bits/component Deep Color 4:2:0 Pixel Encoding
    Supports 10-bits/component Deep Color 4:2:0 Pixel Encoding
  Video Capability Data Block:
    YCbCr quantization: Selectable (via AVI YQ)
    RGB quantization: Selectable (via AVI Q)
    PT scan behavior: No Data
    IT scan behavior: Supports both over- and underscan
    CE scan behavior: Supports both over- and underscan
  Colorimetry Data Block:
    BT2020YCC
    BT2020RGB
  HDR Static Metadata Data Block:
    Electro optical transfer functions:
      Traditional gamma - SDR luminance range
      SMPTE ST2084
      Hybrid Log-Gamma
    Supported static metadata descriptors:
      Static metadata type 1
  YCbCr 4:2:0 Capability Map Data Block:
    VIC  97:  3840x2160   60.000000 Hz  16:9    135.000 kHz    594.000000 MHz
    VIC  96:  3840x2160   50.000000 Hz  16:9    112.500 kHz    594.000000 MHz
    VIC 102:  4096x2160   60.000000 Hz 256:135  135.000 kHz    594.000000 MHz
    VIC 101:  4096x2160   50.000000 Hz 256:135  112.500 kHz    594.000000 MHz
  Vendor-Specific Video Data Block (Dolby), OUI 00-D0-46:
    Version: 1 (12 bytes)
    Supports 2160p60
    DM Version: 3.x
    Colorimetry: P3-D65
    Low Latency: Standard + Low Latency
    Target Min Luminance: 0.00099200 cd/m^2
    Target Max Luminance: 350 cd/m^2
    Unique Rx, Ry: 0.67578125, 0.32031250
    Unique Gx, Gy: 0.25000000, 0.67578125
    Unique Bx, By: 0.13671875, 0.05078125
  Detailed Timing Descriptors:
    DTD 3:  1360x768    60.015162 Hz  85:48    47.712 kHz     85.500000 MHz (1600 mm x 900 mm)
                 Hfront   64 Hsync 112 Hback  256 Hpol P
                 Vfront    3 Vsync   6 Vback   18 Vpol P
Checksum: 0xf1  Unused space in Extension Block: 13 bytes

Last edited by afader (Yesterday 04:13:12)

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#2 Yesterday 12:13:07

Lone_Wolf
Administrator
From: Netherlands, Europe
Registered: 2005-10-04
Posts: 15,018

Re: Can Radeon RX 9070 work DP-HDMI 4K LG TV OLED 120hz in Gnome Wayland?

That resolution requires HDMI FRL support, which is blocked for amd opensource drivers on linux by the owners of hdmi .

A DP 2 HDMI adapter is probably your only choice.

Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

clean chroot building not flexible enough ?
Try clean chroot manager by graysky

Offline

#3 Yesterday 12:26:34

just4arch
Member
Registered: 2023-01-07
Posts: 126

Re: Can Radeon RX 9070 work DP-HDMI 4K LG TV OLED 120hz in Gnome Wayland?

Well looks like this is lined up for 7.2
https://www.phoronix.com/news/Linux-7.2-AMDGPU-FRL-Regs
https://www.phoronix.com/news/AMDGPU-FR … By-Default

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#4 Yesterday 17:49:07

progandy
Member
Registered: 2012-05-17
Posts: 5,309

Re: Can Radeon RX 9070 work DP-HDMI 4K LG TV OLED 120hz in Gnome Wayland?

You said you have a CableMatters DP 2 HDMI adapter. Does this support the full refresh rate and resolution in windows?

Last edited by progandy (Yesterday 17:49:32)

| alias CUTF='LANG=en_XX.UTF-8@POSIX ' | alias ENGLISH='LANG=C.UTF-8 ' |

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#5 Yesterday 23:59:15

afader
Member
Registered: 2013-09-12
Posts: 207

Re: Can Radeon RX 9070 work DP-HDMI 4K LG TV OLED 120hz in Gnome Wayland?

Sooo YES, the DP-HDMI works in Windows, but not Linux. It seems this is related to it not advertising DSC support despite there being enough bandwidth, I tried updating the cablematters firmware.  I also tried booting to windows to export the edid, but it exported as HDMI 2.0 with only 60hz despite Windows offering 120hz that drives it fine thru the adapter (tho it looks kind of lighter/brighter).

Note that after updating the firmware, the CableMatters reports "amdgpu 0000:03:00.0: [drm] DP-HDMI FRL PCON supported" however later it claims "[drm] pre_validate_dsc:1667 MST_DSC dsc precompute is not needed"

So it seems I could patch the kernel to always do dsc but there must be a better way to fix this?

Or I guess wait for 7.2 and chuck the adapter because native HDMI will work?

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#6 Today 05:20:42

cryptearth
Member
Registered: 2024-02-03
Posts: 2,151

Re: Can Radeon RX 9070 work DP-HDMI 4K LG TV OLED 120hz in Gnome Wayland?

afader wrote:

Or I guess wait for 7.2 and chuck the adapter because native HDMI will work?

THAT

just wait - the kernel cycle is usually about 6 weeks or so - with 7.1 soon 7.2 can be expected about in july
just be patient

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