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From:   Daniel Harding <dharding@living180.net>
Subject: [5.3 Regression] x86/ioapic change causes suspend problem
To:     Thomas Gleixner <tglx@linutronix.de>
Cc:     Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "H. Peter Anvin" <hpa@zytor.com>, x86@kernel.org,
        linux-kernel@vger.kernel.org
Message-ID: <6f3101a3-8404-2a6a-b2c1-d6b2e4179938@living180.net>
Date:   Sat, 21 Dec 2019 12:02:33 +0200
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Over the past few weeks I've been experiencing problems with 
suspend/hybrid sleep on my laptop (a Clevo N240BU, Intel Core 
i7-7500U).  Instead of the suspend process completing normally, the 
computer hangs with a blank screen and the CPU fan spinning above idle.  
I have to forcibly power off the computer to get it to turn off.  If I 
invoke hybrid sleep, the hibernation image is intact and I am able to 
resume from that after powering the computer back on.

I bisected the issue, and traced it to commit 
dfe0cf8b51b07e56ded571e3de0a4a9382517231.  Before that commit, suspend 
works reliably, but afterward it hangs most of the time.  I verified 
that the problem still exists in version 5.4.5, but have not tested the 
latest master.

If there is any more information that would be useful or if I can help 
to resolve this issue in any way, please let me know.

Regards,

Daniel Harding