linux-kernel - Re: VT-d and x2apic: broken resume after suspend to ram

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Message-ID: <20131101160206.GM17455@8bytes.org>
Date:	Fri, 1 Nov 2013 17:02:06 +0100
From:	Joerg Roedel <joro@...tes.org>
To:	Peter Senna Tschudin <peter.senna@...il.com>
Cc:	iommu@...ts.linux-foundation.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Seiji Aguchi <seiji.aguchi@....com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Subject: Re: VT-d and x2apic: broken resume after suspend to ram

On Fri, Nov 01, 2013 at 04:47:47PM +0100, Peter Senna Tschudin wrote:
> Only serial ports over USB:
> usb 2-1.3.2: pl2303 converter now attached to ttyUSB0
> 
> The issue with no_console_suspend is that the monitor is powered off
> on suspend and never resume after that. The external monitor enters in
> power save mode during suspend and also never resume. Do you know if
> replacing my wifi/bt card by this:
> 
> http://www.startech.com/Cards-Adapters/Serial-Cards-Adapters/2-Port-RS232-Mini-PCI-Express-Serial-Card-16950-UART~MPEX2S952
> 
> would enable to use the serial console for seeing kernel debug messages?

Who knows, depends on the BIOS in your machine, I guess. But I would say
there is a at least a better chance with this than with a USB-Serial
adapter.


	Joerg


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