升级Ubuntu 22.04至24.04后开机缓慢且Brother MFC-9140cdn扫描仪无法访问的问题求助

大家好，我最近把Ubuntu系统从22.04升级到了24.04，之后遇到了两个头疼的问题：

• 开机速度变得明显缓慢，和升级前比拖沓了不少
• 我的网络打印机Brother MFC-9140cdn现在只能正常打印，但完全没法扫描。不管用simple-scan还是Xsane都找不到扫描仪，根本连不上设备

我查了开机后的错误日志，用命令journalctl --no-pager -b -p err得到的输出如下：

greg@greg-NUC11TNKv7:~$ journalctl --no-pager -b -p err
oct. 20 08:03:13 greg-NUC11TNKv7 kernel: x86/mktme: No known encryption algorithm is supported: 0x0
oct. 20 08:03:13 greg-NUC11TNKv7 kernel: ACPI Error: AE_NOT_FOUND, While resolving a named reference package element - ^SPI1.SPFD.CVFD (20230628/dspkginit-438)
oct. 20 08:03:13 greg-NUC11TNKv7 kernel: ACPI Error: AE_NOT_FOUND, While resolving a named reference package element - ^SPI1.SPFD.CVFD (20230628/dspkginit-438)
oct. 20 08:03:13 greg-NUC11TNKv7 kernel: ACPI Error: AE_NOT_FOUND, While resolving a named reference package element - ^XHCI.RHUB.HS04.VI2C (20230628/dspkginit-438)
oct. 20 08:03:13 greg-NUC11TNKv7 kernel: ACPI Error: AE_NOT_FOUND, While resolving a named reference package element - ^XHCI.RHUB.HS04.VI2C (20230628/dspkginit-438)

有没有朋友碰到过类似的情况？或者能给我一些排查问题的方向建议？非常感谢大家的帮助！

备注：内容来源于stack exchange，提问作者Greg_O