5
29
2014
69

y470烦人的独显

    使用bumblebee和bbswitch虽然能够把独显从小黑屋拖出来偶尔用用,但是更新337.19驱动后发现每次开机GT550M都是工作状态。经检查发现是因为开机的时候在bbswitch加载前检查到设备然后自动加载了nvidia模块和nvidia_uvm。原本在rc.local中加入移除模块的命令,后来发现移除模块后还是会因为其他程序检查硬件后自动加载它们2个,所以不能单单移除模块而是要禁用。

    因为nvidia_uvm依赖于nvidia,bbswitch关闭的时候会因为nvidia模块未移除而无法关闭,而nvidia又因为nvidia_uvm而无法移除,所以关键是禁用nvidia_uvm。因为nvidia_uvm比较顽固,所以就只能强制它载入失败。然后重新生产initramfs。

/etc/modprobe.d/blacklist.conf

blacklist nvidia_uvm
blacklist nvidia
install nvidia_uvm /bin/false

    这样做后还需要/proc/acpi/bbswitch变成OFF,让bumblebee和bbswitch接管独显控制权,不然过会加载了nvidia,bbswitch就失效了。我是在rc.local里面加入"echo OFF > /proc/acpi/bbswitch" ,rc-local的WantedBy=multi-user.target。

    Y470开机后lspci就可以看到GT550M状态ff。

Category: Archlinux | Tags: ArchLinux optimus 双显卡 | Read Count: 1961
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블록체인개발 코인지갑개발 IT컨설팅 메스브레인팀이 항상 당신을 도울 준비가 되어 있습니다. 우리는 마음으로 가치를 창조한다는 철학을 바탕으로 일하며, 들인 노력과 시간에 부흥하는 가치만을 받습니다. 고객이 만족하지 않으면 기꺼이 환불해 드립니다.

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Coin exchange 说:
2024年6月03日 15:14

The tech-original mission is to help you better understand technology, and make better decisions in the fields of IT, Tech, and Crypto.
https://www.tech-original.com/

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Cryto exchange 说:
2024年6月08日 10:58

The tech-original mission is to help you better understand technology, and make better decisions in the fields of IT, Tech, and Crypto.
https://www.tech-original.com/


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