[PATCH 3/4] suspend: Documentation update for IBM Thinkpad X30

[PATCH 3/4] suspend: Documentation update for IBM Thinkpad X30

[Antonino A. Daplas]

As reported in Bugzilla Bug 6406, resume from S3 results in a blank
screen.

For the IBM Thinkpad X30 using vesafb as the console driver, successful
resume from S3 requires option acpi_sleep=s3_bios,s3_mode.  Update
documentation.

I would presume that, in any hardware, using vesafb as the console driver will
require as a minimum s3_mode.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
---

 Documentation/power/video.txt |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/Documentation/power/video.txt b/Documentation/power/video.txt
index d18a57d..51ea8ce 100644
--- a/Documentation/power/video.txt
+++ b/Documentation/power/video.txt
@@ -140,7 +140,7 @@ IBM TP T41p			s3_bios (2), switch to X a
 IBM TP T42			s3_bios (2)
 IBM ThinkPad T42p (2373-GTG)	s3_bios (2)
 IBM TP X20			??? (*)
-IBM TP X30			s3_bios (2)
+IBM TP X30			s3_bios (2), s3_bios,s3_mode (4) if vesafb
 IBM TP X31 / Type 2672-XXH      none (1), use radeontool (http://fdd.com/software/radeon/) to turn off backlight.
 IBM TP X32			none (1), but backlight is on and video is trashed after long suspend. s3_bios,s3_mode (4) works too. Perhaps that gets better results?
 IBM Thinkpad X40 Type 2371-7JG  s3_bios,s3_mode (4)




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Re: [PATCH 3/4] suspend: Documentation update for IBM Thinkpad X30

[Pavel Machek]

On So 22-04-06 10:50:00, Antonino A. Daplas wrote:
> As reported in Bugzilla Bug 6406, resume from S3 results in a blank
> screen.
> 
> For the IBM Thinkpad X30 using vesafb as the console driver, successful
> resume from S3 requires option acpi_sleep=s3_bios,s3_mode.  Update
> documentation.
> 
> I would presume that, in any hardware, using vesafb as the console driver will
> require as a minimum s3_mode.

Well, some hardware just preserves video state, but you are right that
anything that needs s3_bios probably needs s3_mode, too.

Do you think you could try code from suspend.sf.net and fix whitelist
there? It is really wrong to have whitelist in .txt, when it should
have been machine-readable.

(I applied this:

diff --git a/Documentation/power/video.txt
b/Documentation/power/video.txt
index a8004cc..d859faa 100644
--- a/Documentation/power/video.txt
+++ b/Documentation/power/video.txt
@@ -143,7 +143,7 @@ IBM TP T41p                 s3_bios (2), switch to
X a
 IBM TP T42                     s3_bios (2)
 IBM ThinkPad T42p (2373-GTG)   s3_bios (2)
 IBM TP X20                     ??? (*)
-IBM TP X30                     s3_bios (2)
+IBM TP X30                     s3_bios, s3_mode (4)

...we do not want to give wrong options.)
								Pavel
-- 
Thanks for all the (sleeping) penguins.


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Re: [PATCH 3/4] suspend: Documentation update for IBM Thinkpad X30

[Antonino A. Daplas]

Pavel Machek wrote:
> On So 22-04-06 10:50:00, Antonino A. Daplas wrote:
>> As reported in Bugzilla Bug 6406, resume from S3 results in a blank
>> screen.
>>
>> For the IBM Thinkpad X30 using vesafb as the console driver, successful
>> resume from S3 requires option acpi_sleep=s3_bios,s3_mode.  Update
>> documentation.
>>
>> I would presume that, in any hardware, using vesafb as the console driver will
>> require as a minimum s3_mode.
> 
> Well, some hardware just preserves video state, but you are right that
> anything that needs s3_bios probably needs s3_mode, too.

For vgacon, s3_bios may be the only option needed since POSTING automatically goes
to text mode. For vesafb, s3_mode, in most cases, will also required.

> 
> Do you think you could try code from suspend.sf.net and fix whitelist
> there?

I'll try, although in-kernel suspend works for me properly.

Tony


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Re: [PATCH 3/4] suspend: Documentation update for IBM Thinkpad X30

[Pavel Machek]

On Ne 23-04-06 08:31:30, Antonino A. Daplas wrote:
> Pavel Machek wrote:
> > On So 22-04-06 10:50:00, Antonino A. Daplas wrote:
> >> As reported in Bugzilla Bug 6406, resume from S3 results in a blank
> >> screen.
> >>
> >> For the IBM Thinkpad X30 using vesafb as the console driver, successful
> >> resume from S3 requires option acpi_sleep=s3_bios,s3_mode.  Update
> >> documentation.
> >>
> >> I would presume that, in any hardware, using vesafb as the console driver will
> >> require as a minimum s3_mode.
> > 
> > Well, some hardware just preserves video state, but you are right that
> > anything that needs s3_bios probably needs s3_mode, too.
> 
> For vgacon, s3_bios may be the only option needed since POSTING automatically goes
> to text mode. For vesafb, s3_mode, in most cases, will also required.

Agreed.

> > Do you think you could try code from suspend.sf.net and fix whitelist
> > there?
> 
> I'll try, although in-kernel suspend works for me properly.

Please do, we'd really like to use s2ram everywhere (so it "just
works"), and we want to know that we are not breaking working setups,
too. (Plus whitelist entry can probably be improved).

								Pavel

-- 
Thanks for all the (sleeping) penguins.


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