# Error on Boot (i8042: No controller found)

**URL:** <https://forums.suse.com/t/error-on-boot-i8042-no-controller-found/35501>\
**Category:** SUSE Linux Enterprise Server\
**Created:** [March 8, 2021, 10:55pm UTC](https://forums.suse.com/t/error-on-boot-i8042-no-controller-found/35501 "2021-03-08T22:55:06Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Clistenis](https://avatars.discourse-cdn.com/v4/letter/c/c6cbf5/32.png) [@Clistenis](https://forums.suse.com/u/Clistenis)\
**Post date:** [March 8, 2021, 10:55pm UTC](https://forums.suse.com/t/error-on-boot-i8042-no-controller-found/35501/1 "2021-03-08T22:55:06Z")

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Hello everybody.

I have a server with SLES 12 running on a Dell R630, and out of nowhere started to show an error in the boot making it impossible to boot, has anyone been through this and can give me a light?

[4.882496] i8042: No controller found  
[5.179020] megasas: IOC Init cmd success  
[5.255386] megasas: INIT adapter done  
Welcome to emergency mode “After logging in, type” journalctl -xb "to view  
system logs, “systemctl reboot” to reboot, “systemctl default” to try again to boot into default mode.  
Give root password for maintenance  
(or press Control-D to continue):

I’ve tried everything and I don’t know what else to do to be able to recover this OS.

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**Author:** ![malcolmlewis](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/malcolmlewis/32/11375_2.png) [@malcolmlewis](https://forums.suse.com/u/malcolmlewis)\
**Post date:** [March 8, 2021, 11:02pm UTC](https://forums.suse.com/t/error-on-boot-i8042-no-controller-found/35501/2 "2021-03-08T23:02:48Z")

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@Clístenis Hi and welcome to the Forum 🙂  
You need to upgrade the SAS driver… See [https://www.suse.com/support/kb/doc/?id=000019155](https://www.suse.com/support/kb/doc/?id=000019155)