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From: Anatoli N.Chechelnickiy <>
To: "" <>
Cc: "" <>,
	"" <>,
	"" <>
Subject: regressions in iommu system with 5.10.37
Date: Wed, 19 May 2021 08:01:29 +0000	[thread overview]
Message-ID: <> (raw)

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I'm sorry to report about regression in 5.10.37



and iommu=on in grub.cfg

All my dell r340 and all lenovo servers won't boot any more. Just black 
screen at once.

with intel_iommu=on iommu=pt DELL R240 and Lenovo SR350 cat boot

Older Lenovo cannot boot even with "intel_iommu=on iommu=pt" only with 
iommu=off in grub

With iommu=off in grub all servers are booting well

With 5.4.36 do not have this problem

tested last 4 days with 10+ different servers(

Best regards,
Anatoli N. Chechel'nickiy
Senior expert of IT security department

Phone: +380 562 7474 200

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             reply	other threads:[~2021-05-19  8:09 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-19  8:01 Anatoli N.Chechelnickiy [this message]
2021-05-19  8:23 ` regressions in iommu system with 5.10.37 Greg KH

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