联想笔记本Kubuntu 23.04系统屏幕刷新率锁定60Hz无法切换至120Hz求助

各位大佬好，我刚在我的联想笔记本上装了Kubuntu 23.04，这款本的屏幕本身支持120Hz刷新率，但在显示配置里却只能看到60Hz选项。Wayland和X11两种桌面环境我都试过了，问题依然存在。

我执行了命令 sudo get-edid | parse-edid，输出结果如下：

Attempting to use i2c interface

No EDID on bus 0

No EDID on bus 1

No EDID on bus 2

No EDID on bus 3

No EDID on bus 4

No EDID on bus 5

No EDID on bus 6

No EDID on bus 7

No EDID on bus 8

No EDID on bus 9

No EDID on bus 10

No EDID on bus 11

No EDID on bus 13

No EDID on bus 14

No EDID on bus 15

No EDID on bus 16

1 potential busses found: 12

256-byte EDID successfully retrieved from i2c bus 12

Looks like i2c was successful. Have a good day.

Checksum Correct

Section "Monitor"

Identifier ""

ModelName ""

VendorName "CSO"

# Monitor Manufactured week 0 of 2022

# EDID version 1.4

# Digital Display

DisplaySize 300 190

Gamma 2.20

Option "DPMS" "false"

Horizsync 229-229

VertRefresh 40-120

# Maximum pixel clock is 700MHz

#Extension block found. Parsing...

I only know about extension blocks of type 02h. PLEASE email me!

Something strange happened. Please contact the author,

Matthew Kern at <pyrophobicman@gmail.com>

补充说明1：如果我通过X11的恢复模式启动系统，屏幕会显示仅支持91Hz刷新率，但正常重启进入系统后，又只能选60Hz了，这情况实在让人摸不着头脑。

备注：内容来源于stack exchange，提问作者Cheeseboy