强制调整屏幕大小后字体模糊或混乱

Question

我有一台 AOC e2727she 显示器，我想将它与运行 Ubuntu 16.04 的 Dell Inspiron 笔记本电脑一起使用。我使用 HDMI 转 HDMI 电缆将其插入笔记本电脑。当我插入时，我认为可用的最高分辨率是 1024x768，60.00 Hz。我按照说明操作这里为我的显示器创建自定义模式行。

我在这里注意到的一件事是 Ubuntu 认为我的 HDMI 端口是 DisplayPort，但我不知道这是否重要。

另一件重要的事情是，我可以使用 Windows 10 笔记本电脑连接到显示器，并且可以正确地将屏幕大小调整为 1920x1080。

我跑去cvt拿了它

-[zephyr@mimir3]-[~ 130] - 09:30 AM
-> cvt 1920 1080 60
# 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
Modeline "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync

然后我将其合并到 xrandr 中

xrandr --newmode "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
xrandr --addmode DisplayPort-0 1920x1080_60.00
xrandr --output DisplayPort-0 --mode 1920x1080_60.00

我看了看另一个屏幕，它似乎工作正常，但当我将浏览器窗口移到它上面时，所有的文本和图标都变得混乱和模糊。我真的无法从它上面读出内容。

我有点不知道下一步该做什么。

显卡：

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Venus XTX [Radeon HD 8890M / R9 M275X/M375X] (rev 83)

编辑：这是输出sudo lshw -c display; xrandr --verbose

  *-display               
       description: VGA compatible controller
       product: Venus XTX [Radeon HD 8890M / R9 M275X/M375X]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:01:00.0
       version: 83
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
       configuration: driver=radeon latency=0
       resources: irq:139 memory:b0000000-bfffffff memory:de400000-de43ffff ioport:e000(size=256) memory:de440000-de45ffff
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
eDP connected primary 1920x1080+0+0 (0x5b) normal (normal left inverted right x axis y axis) 344mm x 194mm
    Identifier: 0x55
    Timestamp:  636663
    Subpixel:   horizontal rgb
    Gamma:      1.0:1.0:1.0
    Brightness: 1.0
    Clones:    
    CRTC:       0
    CRTCs:      0 1 2 3 4 5
    Transform:  1.000000 0.000000 0.000000
                0.000000 1.000000 0.000000
                0.000000 0.000000 1.000000
               filter: 
    EDID: 
        00ffffffffffff0030e49b0400000000
        0019010495221378ea5755a458559e24
        0d505400000001010101010101010101
        0101010101012e3680a070381f403020
        350058c21000001a522b80a070381f40
        3020350058c21000001a000000fe0046
        37484832803135365746360a00000000
        000041319e001000000a010a2020001d
    scaling mode: Full 
        supported: None, Full, Center, Full aspect
  1920x1080 (0x5b) 138.700MHz +HSync -VSync *current +preferred
        h: width  1920 start 1968 end 2000 total 2080 skew    0 clock  66.68KHz
        v: height 1080 start 1083 end 1088 total 1111           clock  60.02Hz
  1920x1080 (0x5c) 110.900MHz +HSync -VSync
        h: width  1920 start 1968 end 2000 total 2080 skew    0 clock  53.32KHz
        v: height 1080 start 1083 end 1088 total 1111           clock  47.99Hz
  1680x1050 (0x5d) 146.250MHz -HSync +VSync
        h: width  1680 start 1784 end 1960 total 2240 skew    0 clock  65.29KHz
        v: height 1050 start 1053 end 1059 total 1089           clock  59.95Hz
  1400x1050 (0x5e) 121.750MHz -HSync +VSync
        h: width  1400 start 1488 end 1632 total 1864 skew    0 clock  65.32KHz
        v: height 1050 start 1053 end 1057 total 1089           clock  59.98Hz
  1280x1024 (0x5f) 109.000MHz -HSync +VSync
        h: width  1280 start 1368 end 1496 total 1712 skew    0 clock  63.67KHz
        v: height 1024 start 1027 end 1034 total 1063           clock  59.89Hz
  1440x900 (0x60) 106.500MHz -HSync +VSync
        h: width  1440 start 1528 end 1672 total 1904 skew    0 clock  55.93KHz
        v: height  900 start  903 end  909 total  934           clock  59.89Hz
  1280x960 (0x61) 101.250MHz -HSync +VSync
        h: width  1280 start 1360 end 1488 total 1696 skew    0 clock  59.70KHz
        v: height  960 start  963 end  967 total  996           clock  59.94Hz
  1280x854 (0x62) 89.250MHz -HSync +VSync
        h: width  1280 start 1352 end 1480 total 1680 skew    0 clock  53.12KHz
        v: height  854 start  857 end  867 total  887           clock  59.89Hz
  1280x800 (0x63) 83.500MHz -HSync +VSync
        h: width  1280 start 1352 end 1480 total 1680 skew    0 clock  49.70KHz
        v: height  800 start  803 end  809 total  831           clock  59.81Hz
  1280x720 (0x64) 74.500MHz -HSync +VSync
        h: width  1280 start 1344 end 1472 total 1664 skew    0 clock  44.77KHz
        v: height  720 start  723 end  728 total  748           clock  59.86Hz
  1152x768 (0x65) 71.750MHz -HSync +VSync
        h: width  1152 start 1216 end 1328 total 1504 skew    0 clock  47.71KHz
        v: height  768 start  771 end  781 total  798           clock  59.78Hz
  1024x768 (0x66) 63.500MHz -HSync +VSync
        h: width  1024 start 1072 end 1176 total 1328 skew    0 clock  47.82KHz
        v: height  768 start  771 end  775 total  798           clock  59.92Hz
  800x600 (0x67) 38.250MHz -HSync +VSync
        h: width   800 start  832 end  912 total 1024 skew    0 clock  37.35KHz
        v: height  600 start  603 end  607 total  624           clock  59.86Hz
  848x480 (0x68) 31.500MHz -HSync +VSync
        h: width   848 start  872 end  952 total 1056 skew    0 clock  29.83KHz
        v: height  480 start  483 end  493 total  500           clock  59.66Hz
  720x480 (0x69) 26.750MHz -HSync +VSync
        h: width   720 start  744 end  808 total  896 skew    0 clock  29.85KHz
        v: height  480 start  483 end  493 total  500           clock  59.71Hz
  640x480 (0x6a) 23.750MHz -HSync +VSync
        h: width   640 start  664 end  720 total  800 skew    0 clock  29.69KHz
        v: height  480 start  483 end  487 total  500           clock  59.38Hz
DisplayPort-0 connected (normal left inverted right x axis y axis)
    Identifier: 0x56
    Timestamp:  636663
    Subpixel:   horizontal rgb
    Clones:    
    CRTCs:      0 1 2 3 4 5
    Transform:  1.000000 0.000000 0.000000
                0.000000 1.000000 0.000000
                0.000000 0.000000 1.000000
               filter: 
    output_csc: bypass 
        supported: bypass, tvrgb, ycbcr601, ycbcr709
    audio: auto 
        supported: off, on, auto
    scaling mode: None 
        supported: None, Full, Center, Full aspect
    dither: off 
        supported: off, on
    underscan vborder: 0 
        range: (0, 128)
    underscan hborder: 0 
        range: (0, 128)
    underscan: off 
        supported: off, on, auto
    coherent: 1 
        range: (0, 1)
  1024x768 (0x4c1) 65.000MHz -HSync -VSync
        h: width  1024 start 1048 end 1184 total 1344 skew    0 clock  48.36KHz
        v: height  768 start  771 end  777 total  806           clock  60.00Hz
  800x600 (0x4c2) 40.000MHz +HSync +VSync
        h: width   800 start  840 end  968 total 1056 skew    0 clock  37.88KHz
        v: height  600 start  601 end  605 total  628           clock  60.32Hz
  800x600 (0x4d2) 36.000MHz +HSync +VSync
        h: width   800 start  824 end  896 total 1024 skew    0 clock  35.16KHz
        v: height  600 start  601 end  603 total  625           clock  56.25Hz
  848x480 (0x4d3) 33.750MHz +HSync +VSync
        h: width   848 start  864 end  976 total 1088 skew    0 clock  31.02KHz
        v: height  480 start  486 end  494 total  517           clock  60.00Hz
  640x480 (0x4c7) 25.175MHz -HSync -VSync
        h: width   640 start  656 end  752 total  800 skew    0 clock  31.47KHz
        v: height  480 start  490 end  492 total  525           clock  59.94Hz
DisplayPort-1 disconnected (normal left inverted right x axis y axis)
    Identifier: 0x57
    Timestamp:  636663
    Subpixel:   horizontal rgb
    Clones:    
    CRTCs:      0 1 2 3 4 5
    Transform:  1.000000 0.000000 0.000000
                0.000000 1.000000 0.000000
                0.000000 0.000000 1.000000
               filter: 
    output_csc: bypass 
        supported: bypass, tvrgb, ycbcr601, ycbcr709
    audio: auto 
        supported: off, on, auto
    scaling mode: None 
        supported: None, Full, Center, Full aspect
    dither: off 
        supported: off, on
    underscan vborder: 0 
        range: (0, 128)
    underscan hborder: 0 
        range: (0, 128)
    underscan: off 
        supported: off, on, auto
    coherent: 1 
        range: (0, 1)
DisplayPort-2 disconnected (normal left inverted right x axis y axis)
    Identifier: 0x58
    Timestamp:  636663
    Subpixel:   horizontal rgb
    Clones:    
    CRTCs:      0 1 2 3 4 5
    Transform:  1.000000 0.000000 0.000000
                0.000000 1.000000 0.000000
                0.000000 0.000000 1.000000
               filter: 
    output_csc: bypass 
        supported: bypass, tvrgb, ycbcr601, ycbcr709
    audio: auto 
        supported: off, on, auto
    scaling mode: None 
        supported: None, Full, Center, Full aspect
    dither: off 
        supported: off, on
    underscan vborder: 0 
        range: (0, 128)
    underscan hborder: 0 
        range: (0, 128)
    underscan: off 
        supported: off, on, auto
    coherent: 1 
        range: (0, 1)
VGA-0 disconnected (normal left inverted right x axis y axis)
    Identifier: 0x59
    Timestamp:  636663
    Subpixel:   no subpixels
    Clones:    
    CRTCs:      0 1 2 3 4 5
    Transform:  1.000000 0.000000 0.000000
                0.000000 1.000000 0.000000
                0.000000 0.000000 1.000000
               filter: 
    output_csc: bypass 
        supported: bypass, tvrgb, ycbcr601, ycbcr709
    scaling mode: None 
        supported: None, Full, Center, Full aspect
    load detection: 1 
        range: (0, 1)

编辑：我拿了一根主计算机上使用的 DVI 电缆，将其插入 DVI 到 Mini Displayport 适配器，然后将其插入我的戴尔电脑。这确实成功了。Ubuntu 自动显示显示器，并且名称正确，与之前的 HDMI 适配器不同。也许显示器上的 HDMI 端口有问题？我不会将此标记为已回答，因为它没有解释与 HDMI 端口相关的情况。