我刚刚将我的 HTPC 从 Windows 7 迁移到 Ubuntu 16.04。安装顺利，但是，在 1280x720 或 1920x1080 的分辨率下，实际桌面比电视屏幕更宽（主要在左侧和右侧，但顶部和底部也有点宽）。这意味着我只能看到左侧工具栏的一小部分（对于启动应用程序很有用！）。之前在 Win7 上，桌面在 1280x720 和 1920x1080 的屏幕上完美固定。
一个有趣的事实是，当我进入 Ubuntu 的控制面板 -> 显示设置来更改分辨率和显示设置时，它似乎将我的显示器（通过 HDMI 连接的电视）检测为三星电气公司的 50 英寸。我碰巧有一台三星 42 英寸等离子电视。也许 EDID 被错误读取了？我一直在尝试使用 xrandr 和 cdv 测试新的模式行，但似乎没有任何效果。有人能帮忙正确配置它吗？
一些背景信息：
系统规格：
- 显示器：三星等离子显示器，HP-R4272
- 连接：HDMI MB：华硕 M4A785-M，集成 ATI Radeon HD4200
- Ubuntu：16.04 显示
- 驱动程序：radeon
来自编辑阅读：
Section "Monitor"
Identifier "SAMSUNG PDP"
ModelName "SAMSUNG PDP"
VendorName "SAM"
# Monitor Manufactured week 50 of 2004
# EDID version 1.3
# Digital Display
DisplaySize 1110 620
Gamma 2.20
Option "DPMS" "false"
Horizsync 30-48
VertRefresh 55-65
# Maximum pixel clock is 80MHz
#Extension block found. Parsing...
Modeline "Mode 5" 27.00 720 736 798 858 480 489 495 525 -hsync -vsync
Modeline "Mode 0" 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync
Modeline "Mode 1" 74.25 1920 2008 2052 2200 540 542 547 562 +hsync +vsync interlace
Modeline "Mode 2" 74.250 1280 1390 1420 1650 720 725 730 750 +hsync +vsync
Modeline "Mode 3" 74.250 1920 2008 2052 2200 1080 1082 1087 1125 +hsync +vsync interlace
Modeline "Mode 4" 27.027 720 736 798 858 480 489 495 525 -hsync -vsync
Option "PreferredMode" "Mode 5"
来自 xrandr —verbose：
Screen 0: minimum 320 x 200, current 1280 x 720, maximum 8192 x 8192
VGA-0 disconnected (normal left inverted right x axis y axis)
Identifier: 0x51
Timestamp: 19274
Subpixel: no subpixels
Clones:
CRTCs: 0 1
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
scaling mode: None
supported: None, Full, Center, Full aspect
load detection: 1
range: (0, 1)
HDMI-0 connected primary 1280x720+0+0 (0x54) normal (normal left inverted right x axis y axis) 1102mm x 620mm
Identifier: 0x52
Timestamp: 19274
Subpixel: horizontal rgb
Gamma: 1.0:1.0:1.0
Brightness: 1.0
Clones:
CRTC: 0
CRTCs: 0 1
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
EDID:
00ffffffffffff004c2d8a0100000000
320e0103806f3e780aee91a3544c9926
0f505420000001010101010101010101
010101010101011d007251d01e206e28
55004e6c4200001e011d8018711c1620
582c25004e6c4200009e000000fd0037
411e3008000a202020202020000000fc
0053414d53554e47205044500a20011d
02031671438405032309070783010000
65030c0010008c0ad08a20e02d10103e
96004e6c420000180000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
0000000000000000000000000000003e
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)
1280x720 (0x54) 74.250MHz +HSync +VSync *current +preferred
h: width 1280 start 1390 end 1430 total 1650 skew 0 clock 45.00KHz
v: height 720 start 725 end 730 total 750 clock 60.00Hz
1920x1080i (0x55) 74.250MHz +HSync +VSync Interlace
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 33.75KHz
v: height 1080 start 1084 end 1094 total 1125 clock 60.00Hz
1920x1080i (0x56) 74.176MHz +HSync +VSync Interlace
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 33.72KHz
v: height 1080 start 1084 end 1094 total 1125 clock 59.94Hz
1280x720 (0x57) 74.176MHz +HSync +VSync
h: width 1280 start 1390 end 1430 total 1650 skew 0 clock 44.96KHz
v: height 720 start 725 end 730 total 750 clock 59.94Hz
720x480 (0x58) 27.027MHz -HSync -VSync
h: width 720 start 736 end 798 total 858 skew 0 clock 31.50KHz
v: height 480 start 489 end 495 total 525 clock 60.00Hz
720x480 (0x59) 27.000MHz -HSync -VSync
h: width 720 start 736 end 798 total 858 skew 0 clock 31.47KHz
v: height 480 start 489 end 495 total 525 clock 59.94Hz
640x480 (0x5a) 25.200MHz -HSync -VSync
h: width 640 start 656 end 752 total 800 skew 0 clock 31.50KHz
v: height 480 start 490 end 492 total 525 clock 60.00Hz
640x480 (0x5b) 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
来自 CTV：
# 1280x768 59.87 Hz (CVT) hsync: 47.78 kHz; pclk: 79.50 MHz
Modeline "1280x768_60.00" 79.50 1280 1344 1472 1664 768 771 781 798 -hsync +vsync
来自 gtf：
# 1280x768 @ 60.00 Hz (GTF) hsync: 47.70 kHz; pclk: 80.14 MHz
Modeline "1280x768_60.00" 80.14 1280 1344 1480 1680 768 769 772 795 -HSync +Vsync