---
{
  title: "Xorg 红蓝两色通道异常 默认分辨率和色深设置",
  description: "Xorg显示颜色异常（如红色显蓝），因色深设置错误，将8bit改为16bit后修复。需在配置中指定amdgpu驱动并设DefaultDepth为16，原modesetting驱动不支持16bit下1920x1080分辨率。调整配置后问题解决。",
  draft: false,
  type: "article",
  created_at: "2024-07-15T02:35:00+08:00",
  published_at: "2024-07-15T02:45:00+08:00",
  updated_at: [ "2024-07-15T02:45:00+08:00"],
  category: '个人',
  tags: [ "Linux" ],
  tech_stack: [ "Linux" ],
  tech_stack_percent: [ 1 ],
  tech_stack_icon_names: [ "simple-icons:linux" ],
  tech_stack_theme_colors: [ "#263238" ],
}
---
!!!warning  Legacy Article 过时的文章
此文章从旧博客迁移而来，编写时技术水平有限，仅供参考
!!!

现象：红色显示蓝色，蓝色显示黄色
原因：Xorg色深设置错误，从8bit提升至16bit后显示正确
相关conf：
```
Section "Device"
    Identifier	"AMD"
    Driver      "amdgpu"
EndSection

Section	"Screen"
    Identifier	"Default Screen"
    Device	"amdgpu"
    Monitor	"Default Monitor"
    DefaultDepth 16

    SubSection "Display"
        Depth 	16
	Modes 	"1920x1080"
    EndSubSection
EndSection

### Valid values for rotation are "normal", "left", "right"
Section	"Monitor"
    Identifier	"Default Monitor"
    # Option	"Rotate" "normal"
    # 1920x1080 @ 60.00 Hz (GTF) hsync: 67.08 kHz; pclk: 172.80 MHz
    Modeline "1920x1080_60.00"  172.80  1920 2040 2248 2576  1080 1081 1084 1118  -HSync +Vsync
EndSection
```
正点原子RK3568的默认配置中，Device使用的驱动是modesetting，该驱动在16bit色深下不能提升分辨率至1920x1080
你可以通过执行 `sudo X :1 -configure` （:1 可以是其它非0数字，不要是已激活的屏幕就行）
```
X.Org X Server 1.21.1.7
X Protocol Version 11, Revision 0
Current Operating System: Linux atompi-ca1 5.10.160 #1 SMP Tue Jan 30 11:01:02 CST 2024 aarch64
Kernel command line: earlycon=uart8250,mmio32,0xfe660000 root=/dev/mmcblk0p3 earlyprintk console=ttyFIQ0 rootwait rw 
xorg-server 2:21.1.7-3+deb12u7 (https://www.debian.org/support) 
Current version of pixman: 0.42.2
	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.1.log", Time: Sun Jul 14 18:42:15 2024
List of video drivers:
	amdgpu
	ati
	nouveau
	radeon
	modesetting
	fbdev
	vesa
No devices to configure.  Configuration failed.
(EE) Server terminated with error (2). Closing log file.
```