ubuntu频繁死机--独立显卡问题

• 问题：笔记本安装ubuntu时以及装好后有时会出现花屏、死机的问题，系统报错

*ERROR* UVD not responding, trying to reset the VCPU!!! *ERROR* UVD not responding, trying to reset the VCPU!!!

*ERROR* UVD not responding, trying to reset the VCPU!!! *ERROR* UVD not responding, trying to reset the VCPU!!!

*ERROR* UVD not responding, trying to reset the VCPU!!! *ERROR* UVD not responding, trying to reset the VCPU!!!

*ERROR* UVD not responding, trying to reset the VCPU!!! *ERROR* UVD not responding, trying to reset the VCPU!!!

*ERROR* UVD not responding, trying to reset the VCPU!!! *ERROR* UVD not responding, trying to reset the VCPU!!!

*ERROR* UVD not responding, trying to reset the VCPU!!! *ERROR* UVD not responding, trying to reset the VCPU!!!

*ERROR* UVD not responding, trying to reset the VCPU!!!

• 原因：系统缺少独立显卡的驱动
• 解决：修改启动配置文件，将独立显卡的设置为开机不加载，具体配置如下： 

　　sudo nano /etc/default/grub

　　将里面的

　　GRUB_CMDLINE_LINUX=""

　　改为

　　GRUB_CMDLINE_LINUX="radeon.modeset=0"

　然后保存文件并更新grub

　　sudo update-grub

　更新完成后重启
　如果上面的方式不能解决问题，可以尝试将

　　GRUB_CMDLINE_LINUX="radeon.modeset=0"

　　更改为

　　GRUB_CMDLINE_LINUX="nomodeset"

　　注：通过dmesg查询错误信息

　　dmesg | grep radeon