我刚装了Ubuntu 22.04，也装了最新的NVIDIA驱动。在BIOS设为仅GPU模式时，显示器能跑到240Hz，但我想切换到混合模式，这样就能轻松在“省电模式（仅Intel核显）”和“性能模式（仅NVIDIA独显用于游戏）”之间切换。

NVIDIA Prime是随驱动自动安装的，“按需模式”用着没问题，但开启“性能模式”（理论上应该禁用核显）并重启后，GNOME控制中心里刷新率卡在60Hz，奇怪的是还显示两个60Hz选项。

我还注意到Minecraft的视频设置里，可选分辨率看起来都是Intel核显的规格：

• 2560x1440@60
• 2048x1152@60
• 1920x1440@60
• ...
• 1440x810@120

但游戏里按F3看显示信息却是“Nvidia GeForce RTX 4060 Laptop GPU/PCIe/SSE2...”，说明应该是在用独显才对。

补充信息 #

• BIOS仅独显模式下，Minecraft里只有2560x1440@240和2560x1440@60两个分辨率选项。

BIOS混合模式+Prime性能模式重启后的xrandr -q输出

$ xrandr -q

Screen 0: minimum 8 x 8, current 2560 x 1440, maximum 32767 x 32767
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
DP-4 disconnected (normal left inverted right x axis y axis)
eDP-1-1 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
   2560x1440     60.00*+  60.00
   1920x1440     60.00
   1856x1392     60.00
   1792x1344     60.00
   2048x1152     60.00
   1920x1200     60.00
   1920x1080     60.00
   1600x1200     60.00
   1680x1050     60.00
   1400x1050     60.00
   1600x900      60.00
   1280x1024     60.00
   1400x900      60.00
   1280x960      60.00
   1440x810      60.00
   1368x768      60.00
   1280x800      60.00
   1280x720      60.00
   1024x768      60.00
   960x720       60.00
   928x696       60.00
   896x672       60.00
   1024x576      60.00
   960x600       60.00
   960x540       60.00
   800x600       60.00
   840x525       60.00
   864x486       60.00
   700x525       60.00
   800x450       60.00
   640x512       60.00
   700x450       60.00
   640x480       60.00
   720x405       60.00
   684x384       60.00
   640x360       60.00
   512x384       60.00
   512x288       60.00
   480x270       60.00
   400x300       60.00
   432x243       60.00
   320x240       60.00
   360x202       60.00
   320x180       60.00
DP-1-1 disconnected (normal left inverted right x axis y axis)
HDMI-1-1 disconnected (normal left inverted right x axis y axis)
DP-1-2 disconnected (normal left inverted right x axis y axis)
HDMI-1-2 disconnected (normal left inverted right x axis y axis)

BIOS仅独显模式下的xrandr -q输出

$ xrandr -q

Screen 0: minimum 8 x 8, current 2560 x 1440, maximum 32767 x 32767
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
DP-4 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 340mm x 190mm
   2560x1440     60.00 + 240.00*

我理解的是，BIOS仅独显模式和BIOS混合模式+Prime性能模式下的xrandr输出应该是一致的？

想请教大家：

• 怎么在BIOS混合模式+Prime性能模式下开启240Hz刷新率？
• 要不要换成Bumblebee来解决这个问题？

备注：内容来源于stack exchange，提问作者Lpkr