linux-kernel - Re: Suspend on Lenovo 3000 V200

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Message-Id: <200804061810.08398.me@nikosapi.org>
Date:	Sun, 6 Apr 2008 18:10:08 -0400
From:	nikosapi <me@...osapi.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	linux-acpi@...r.kernel.org, Len Brown <lenb@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>, Pavel Machek <pavel@....cz>
Subject: Re: Suspend on Lenovo 3000 V200 - Linux 2.6.25rc8

On April 6, 2008 16:21:57 Rafael J. Wysocki wrote:
> On Sunday, 6 of April 2008, Nick Nobody wrote:
> > Hello,
>
> Hi,
>
> > I'm trying to get suspend working properly on my Lenovo 3000 V200. I'm
> > using Linux 2.6.25rc8 and the latest xf86-video-intel. Before I was
> > using kernel-2.6.23.15-137.fc8, xorg-x11-drv-i810-2.1.1-8.fc8 and
> > suspend worked perfectly.
> >
> > The laptop will go to sleep properly but it doesn't seem to enjoy
> > waking up. When it starts up it will either display a black screen and
> > remain frozen or I will end up at a virtual term login prompt but when
> > I put in my username it never prompts me for my password.
> >
> > The only way to get suspend working reasonably well is to first
> > hibernate and then suspend. After a hibernation suspend seems to work
> > fine :S
> >
> > I'm a real noob when it comes to figuring out these sort of things, so
> > any pointers on things I could try would be much appreciated.
> >
> > Here's what s2ram has to say about my hardware:
> > Machine is unknown.
> > This machine can be identified by:
> >     sys_vendor   = "LENOVO"
> >     sys_product  = "07642CU"
> >     sys_version  = "LENOVO3000 V200"
> >     bios_version = "65ET32WW (1.06 )"
> >
> > Here's the output of dmidecode: http://pastebin.ca/973442
>
> Can you try to run "echo mem > /sys/power/state" instead of s2ram and see
> if the symptoms are the same?
>
> Also, please try reverting commit 7c0ea45be4f114d85ee35caeead8e1660699c46f
> (reproduced below for conveninence) and see if that helps.
>
> Thanks,
> Rafael
>
> ---
> commit 7c0ea45be4f114d85ee35caeead8e1660699c46f
> Author: Zhao Yakui <yakui.zhao@...el.com>
> Date:   Tue Mar 11 16:56:47 2008 +0800
>
>     ACPI: Ignore _BQC object when registering backlight device
>
>     According to acpi spec , the objects of  _BCL and _BCM are required if
>     integrated LCD is present and supports brightness level .The _BQC is
>     the optional object. So the _BQC object is ignored when the backlight
> device is registered in ACPI video driver.
>
>     http://bugzilla.kernel.org/show_bug.cgi?id=10206
>
>     Signed-off-by: Zhao Yakui <yakui.zhao@...el.com>
>     Signed-off-by: Zhang Rui  <rui.zhang@...el.com>
>     Signed-off-by: Len Brown <len.brown@...el.com>
>
> diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
> index 12cce69..ace958c 100644
> --- a/drivers/acpi/video.c
> +++ b/drivers/acpi/video.c
> @@ -713,7 +713,7 @@ static void acpi_video_device_find_cap(struct
> acpi_video_device *device)
>
>  	kfree(obj);
>
> -	if (device->cap._BCL && device->cap._BCM && device->cap._BQC && max_level
> > 0){ +	if (device->cap._BCL && device->cap._BCM && max_level > 0) {
>  		int result;
>  		static int count = 0;
>  		char *name;
> --
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Hello Rafael,

I tested with that patch and the problem persists, when the laptop resumes it 
locks up (with a black screen). If I add acpi_apic_instance=2 acpi_osi=Linux 
as kernel boot options (as suggested by my dmesg) when it resumes I get back 
to a virtual term but I'm not able to log in. After entering my username it 
just hangs there.

nick
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