KDE Neon、Vega 64、およびPixio px277hを使用してxrandrが144hz設定を使用するように手動で試しましたが、これが正しく検出されないようです。モニターには144hz機能があり、付属のケーブルにも144hz機能があり（High-Speedと表示）、Vega 64にはHDMI 2.0があるため、ハードウェアの面では問題ありません。詳細は次のとおりです。
uname -r
4.15.0-39-generic
cvt 2560 1440 144
"2560x1440_144.00" 808.75 2560 2792 3072 3584 1440 1443 1448 1568 -hsync +vsync
xrandr --newmode "2560x1440_144.00" 808.75 2560 2792 3072 3584 1440 1443 1448 1568 -hsync+垂直同期
xrandr --addmode HDMI-A-0 2560x1440_144.00
xrandr - 出力HDMI-A-0 - モード2560x1440_144.00
xrandr: unrecognized option '2560x1440_144.00'
ランダル
Screen 0: minimum 320 x 200, current 2560 x 1440, maximum 16384 x 16384
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
DisplayPort-1 disconnected (normal left inverted right x axis y axis)
DisplayPort-2 disconnected (normal left inverted right x axis y axis)
HDMI-A-0 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 597mm x 336mm
2560x1440 59.95*+
3840x2160 30.00 25.00 24.00 29.97 23.98
1920x1200 59.95
1920x1080 60.00 50.00 59.94
1600x1200 59.95
1680x1050 59.88
1600x900 60.00
1280x1024 75.02 60.02
1440x900 59.90
1280x800 59.95
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
800x600 72.19 75.00 60.32 56.25
720x576 50.00
720x480 60.00 59.94
640x480 75.00 72.81 60.00 59.94
720x400 70.08
2560x1440_144.00 143.91
Xorg.0.logのEDID関連フラグメント：
[ 16.812] (II) AMDGPU(0): EDID for output DisplayPort-0
[ 16.812] (II) AMDGPU(0): EDID for output DisplayPort-1
[ 16.812] (II) AMDGPU(0): EDID for output DisplayPort-2
[ 16.812] (II) AMDGPU(0): EDID for output HDMI-A-0
[ 16.812] (II) AMDGPU(0): Manufacturer: OPD Model: 2700 Serial#: 0
[ 16.812] (II) AMDGPU(0): Year: 2018 Week: 22
[ 16.812] (II) AMDGPU(0): EDID Version: 1.3
16.812] (II) AMDGPU(0): Digital Display Input
[ 16.812] (II) AMDGPU(0): Max Image Size [cm]: horiz.: 60 vert.: 34
[ 16.812] (II) AMDGPU(0): Gamma: 2.20
[ 16.812] (II) AMDGPU(0): DPMS capabilities: StandBy Suspend Off
[ 16.812] (II) AMDGPU(0): Supported color encodings: RGB 4:4:4 YCrCb 4:4:4 YCrCb 4:2:2
[ 16.812] (II) AMDGPU(0): Default color space is primary color space
[ 16.812] (II) AMDGPU(0): First detailed timing is preferred mode
[ 16.812] (II) AMDGPU(0): redX: 0.640 redY: 0.330 greenX: 0.300 greenY: 0.600
[ 16.812] (II) AMDGPU(0): blueX: 0.150 blueY: 0.060 whiteX: 0.313 whiteY: 0.329
[ 16.812] (II) AMDGPU(0): Supported established timings:
[ 16.812] (II) AMDGPU(0): 720x400@70Hz
[ 16.812] (II) AMDGPU(0): 640x480@60Hz
[ 16.812] (II) AMDGPU(0): 640x480@72Hz
[ 16.812] (II) AMDGPU(0): 640x480@75Hz
[ 16.812] (II) AMDGPU(0): 800x600@56Hz
[ 16.812] (II) AMDGPU(0): 800x600@60Hz
[ 16.812] (II) AMDGPU(0): 800x600@72Hz
[ 16.812] (II) AMDGPU(0): 800x600@75Hz
[ 16.812] (II) AMDGPU(0): 1024x768@60Hz
[ 16.812] (II) AMDGPU(0): 1024x768@70Hz
[ 16.812] (II) AMDGPU(0): 1024x768@75Hz
[ 16.812] (II) AMDGPU(0): 1280x1024@75Hz
[ 16.812] (II) AMDGPU(0): Manufacturer's mask: 0
[ 16.812] (II) AMDGPU(0): Supported standard timings:
[ 16.812] (II) AMDGPU(0): #0: hsize: 1152 vsize 864 refresh: 75 vid: 20337
[ 16.812] (II) AMDGPU(0): #1: hsize: 1280 vsize 720 refresh: 60 vid: 49281
[ 16.812] (II) AMDGPU(0): #2: hsize: 1280 vsize 1024 refresh: 60 vid: 32897
[ 16.812] (II) AMDGPU(0): #3: hsize: 1440 vsize 900 refresh: 60 vid: 149
[ 16.812] (II) AMDGPU(0): #4: hsize: 1600 vsize 900 refresh: 60 vid: 49321
[ 16.812] (II) AMDGPU(0): #5: hsize: 1680 vsize 1050 refresh: 60 vid: 179
[ 16.812] (II) AMDGPU(0): #6: hsize: 1920 vsize 1080 refresh: 60 vid: 49361
[ 16.812] (II) AMDGPU(0): Supported detailed timing:
[ 16.812] (II) AMDGPU(0): clock: 241.5 MHz Image Size: 597 x 336 mm
[ 16.812] (II) AMDGPU(0): h_active: 2560 h_sync: 2608 h_sync_end 2640 h_blank_end 2720 h_border: 0
[ 16.812] (II) AMDGPU(0): v_active: 1440 v_sync: 1443 v_sync_end 1448 v_blanking: 1481 v_border: 0
[ 16.812] (II) AMDGPU(0): Supported detailed timing:
[ 16.812] (II) AMDGPU(0): clock: 302.1 MHz Image Size: 597 x 336 mm
[ 16.812] (II) AMDGPU(0): h_active: 2560 h_sync: 2608 h_sync_end 2640 h_blank_end 2720 h_border: 0
[ 16.812] (II) AMDGPU(0): v_active: 1440 v_sync: 1443 v_sync_end 1448 v_blanking: 1481 v_border: 0
[ 16.812] (II) AMDGPU(0): Stereo: left channel on sync
[ 16.812] side-by-side interleaved(II) AMDGPU(0): Ranges: V min: 40 V max: 101 Hz, H min: 25 H max: 110 kHz, PixClock max 315 MHz
[ 16.812] (II) AMDGPU(0): Monitor name: PX227H-HDMI2
[ 16.812] (II) AMDGPU(0): Supported detailed timing:
[ 16.812] (II) AMDGPU(0): clock: 148.5 MHz Image Size: 510 x 287 mm
[ 16.812] (II) AMDGPU(0): h_active: 1920 h_sync: 2008 h_sync_end 2052 h_blank_end 2200 h_border: 0
[ 16.812] (II) AMDGPU(0): v_active: 1080 v_sync: 1084 v_sync_end 1089 v_blanking: 1125 v_border: 0
[ 16.812] (II) AMDGPU(0): Supported detailed timing:
[ 16.812] (II) AMDGPU(0): clock: 74.2 MHz Image Size: 510 x 287 mm
[ 16.812] (II) AMDGPU(0): h_active: 1920 h_sync: 2008 h_sync_end 2052 h_blank_end 2200 h_border: 0
[ 16.812] (II) AMDGPU(0): v_active: 540 v_sync: 542 v_sync_end 547 v_blanking: 562 v_border: 0
[ 16.812] (II) AMDGPU(0): Supported detailed timing:
[ 16.812] (II) AMDGPU(0): clock: 74.2 MHz Image Size: 510 x 287 mm
[ 16.812] (II) AMDGPU(0): h_active: 1280 h_sync: 1390 h_sync_end 1430 h_blank_end 1650 h_border: 0
[ 16.812] (II) AMDGPU(0): v_active: 720 v_sync: 725 v_sync_end 730 v_blanking: 750 v_border: 0
[ 16.812] (II) AMDGPU(0): Number of EDID sections to follow: 1
[ 16.812] (II) AMDGPU(0): EDID (in hex):
[ 16.812] (II) AMDGPU(0): 00ffffffffffff003e04002700000000
[ 16.812] (II) AMDGPU(0): 161c0103803c2278feee95a3544c9926
[ 16.812] (II) AMDGPU(0): 0f5054afcf00714f81c081809500a9c0
[ 16.812] (II) AMDGPU(0): b300d1c00101565e00a0a0a029503020
[ 16.812] (II) AMDGPU(0): 350055502100001a037600a0a0a02950
[ 16.812] (II) AMDGPU(0): 30203500555021000030000000fd0028
[ 16.812] (II) AMDGPU(0): 65196e1f000a202020202020000000fc
[ 16.812] (II) AMDGPU(0): 005058323237482d48444d4932000155
[ 16.812] (II) AMDGPU(0): 020339f14f0102030405079012131416
[ 16.812] (II) AMDGPU(0): 1f5f5d6923090707830100006d030c00
[ 16.812] (II) AMDGPU(0): 10003844200060030200e305ff01e30f
[ 16.812] (II) AMDGPU(0): 0000e6060701605346023a801871382d
[ 16.812] (II) AMDGPU(0): 40582c4500fe1f1100001e011d801871
[ 16.812] (II) AMDGPU(0): 1c1620582c2500fe1f1100009e011d00
[ 16.812] (II) AMDGPU(0): 7251d01e206e285500fe1f1100001e00
[ 16.812] (II) AMDGPU(0): 00000000000000000000000000000024
[ 16.812] (--) AMDGPU(0): HDMI max TMDS frequency 340000KHz
...
[ 21.506] (II) AMDGPU(0): EDID vendor "OPD", prod id 9984
[ 21.506] (II) AMDGPU(0): DDCModeFromDetailedTiming: Ignoring: We don't handle stereo.
[ 21.506] (II) AMDGPU(0): Using EDID range info for horizontal sync
[ 21.506] (II) AMDGPU(0): Using EDID range info for vertical refresh
[ 21.506] (II) AMDGPU(0): Printing DDC gathered Modelines:
[ 21.506] (II) AMDGPU(0): Modeline "2560x1440"x0.0 241.50 2560 2608 2640 2720 1440 1443 1448 1481 +hsync -vsync (88.8 kHz eP)
[ 21.506] (II) AMDGPU(0): Modeline "1920x1080"x0.0 148.50 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync (67.5 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "1920x1080i"x0.0 74.25 1920 2008 2052 2200 1080 1084 1094 1125 interlace +hsync +vsync (33.8 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "1280x720"x0.0 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync (45.0 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "800x600"x0.0 40.00 800 840 968 1056 600 601 605 628 +hsync +vsync (37.9 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "800x600"x0.0 36.00 800 824 896 1024 600 601 603 625 +hsync +vsync (35.2 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "640x480"x0.0 31.50 640 656 720 840 480 481 484 500 -hsync -vsync (37.5 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "640x480"x0.0 31.50 640 664 704 832 480 489 492 520 -hsync -vsync (37.9 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "640x480"x0.0 25.18 640 656 752 800 480 490 492 525 -hsync -vsync (31.5 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "720x400"x0.0 28.32 720 738 846 900 400 412 414 449 -hsync +vsync (31.5 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "1280x1024"x0.0 135.00 1280 1296 1440 1688 1024 1025 1028 1066 +hsync +vsync (80.0 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "1024x768"x0.0 78.75 1024 1040 1136 1312 768 769 772 800 +hsync +vsync (60.0 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "1024x768"x0.0 75.00 1024 1048 1184 1328 768 771 777 806 -hsync -vsync (56.5 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "1024x768"x0.0 65.00 1024 1048 1184 1344 768 771 777 806 -hsync -vsync (48.4 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "800x600"x0.0 49.50 800 816 896 1056 600 601 604 625 +hsync +vsync (46.9 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "800x600"x0.0 50.00 800 856 976 1040 600 637 643 666 +hsync +vsync (48.1 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "1152x864"x0.0 108.00 1152 1216 1344 1600 864 865 868 900 +hsync +vsync (67.5 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "1280x720"x60.0 74.48 1280 1336 1472 1664 720 721 724 746 -hsync +vsync (44.8 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "1280x1024"x0.0 108.00 1280 1328 1440 1688 1024 1025 1028 1066 +hsync +vsync (64.0 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "1440x900"x0.0 88.75 1440 1488 1520 1600 900 903 909 926 +hsync -vsync (55.5 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "1600x900"x60.0 119.00 1600 1696 1864 2128 900 901 904 932 -hsync +vsync (55.9 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "1680x1050"x0.0 119.00 1680 1728 1760 1840 1050 1053 1059 1080 +hsync -vsync (64.7 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "1920x1080"x60.0 172.80 1920 2040 2248 2576 1080 1081 1084 1118 -hsync +vsync (67.1 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "720x480"x0.0 27.00 720 736 798 858 480 489 495 525 -hsync -vsync (31.5 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "1440x480i"x0.0 27.00 1440 1478 1602 1716 480 488 494 525 interlace -hsync -vsync (15.7 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "720x576"x0.0 27.00 720 732 796 864 576 581 586 625 -hsync -vsync (31.2 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "1280x720"x0.0 74.25 1280 1720 1760 1980 720 725 730 750 +hsync +vsync (37.5 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "1920x1080i"x0.0 74.25 1920 2448 2492 2640 1080 1084 1094 1125 interlace +hsync +vsync (28.1 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "1440x576i"x0.0 27.00 1440 1464 1590 1728 576 580 586 625 interlace -hsync -vsync (15.6 kHz e)
[ 21.506] (II) AMDGPU(0): Modeline "1920x1080"x0.0 148.50 1920 2448 2492 2640 1080 1084 1089 1125 +hsync +vsync (56.2 kHz e)
cvtの情報とaddmode入力オプションがありますが、なぜ使用できないのですか？この問題をどのように解決できますか？このビデオに基づいて、Vegaグラフィックカードが2560x1440と144hzをサポートできることがわかりました。 https://www.youtube.com/watch?v=cB5RRdTi9bY
ベストアンサー1
最初のxrandrコマンドを忘れました：
xrandr --newmode 2560x1440_144.00 "808.75 2560 2792 3072 3584 1440 1443 1448 1568 -hsync +vsync"
最後の行が間違っています。
xrandr --output HDMI-A-0 --mode 2560x1440_144.00