Double suspend to ram doesn't work on acer aspire 5720g

Double suspend to ram doesn't work on acer aspire 5720g

[Maxim Levitsky]

Hi,

If I suspend system to ram twice, the system hangs on resume.

Otherwise system suspends fine.

I can do the following:

suspend to disk
suspend to disk
suspend to ram
suspend to disk
suspend to ram
suspend to disk
suspend to disk.

but not this:

suspend to ram
suspend to ram.
<-> hang


Before I start digging deeper, are there patches floating around that 
could fix this issue?

(I use latest linus -git kernel)

(I tried to use minimal system and got same results)

Have to confess that I use nvidia binary drivers, and without them
video doesn't resume, but I did test this issue without them, and
got same results.

(after first suspend to ram video didn't resume, but I was able to 
control the system with keyboard, and I then put it to sleep again, and 
on resume, system didn't respond.)

Best regards,
	Maxim Levitsky

Re: Double suspend to ram doesn't work on acer aspire 5720g

[Rafael J. Wysocki]

On Sunday, 15 of June 2008, Maxim Levitsky wrote:
> Hi,

Hi,

> If I suspend system to ram twice, the system hangs on resume.
> 
> Otherwise system suspends fine.
> 
> I can do the following:
> 
> suspend to disk
> suspend to disk
> suspend to ram
> suspend to disk
> suspend to ram
> suspend to disk
> suspend to disk.
> 
> but not this:
> 
> suspend to ram
> suspend to ram.
> <-> hang
> 
> 
> Before I start digging deeper, are there patches floating around that 
> could fix this issue?
> 
> (I use latest linus -git kernel)
> 
> (I tried to use minimal system and got same results)
> 
> Have to confess that I use nvidia binary drivers, and without them
> video doesn't resume, but I did test this issue without them, and
> got same results.
> 
> (after first suspend to ram video didn't resume, but I was able to 
> control the system with keyboard, and I then put it to sleep again, and 
> on resume, system didn't respond.)

Hard to say what the problem is.  If it's a regression (ie. you have a kernel
that works 100% of the time) and is readily reproducible, bisection may help
find the patch that broke it.

Thanks,
Rafael

Re: Double suspend to ram doesn't work on acer aspire 5720g

[Maxim Levitsky]

Rafael J. Wysocki wrote:
> On Sunday, 15 of June 2008, Maxim Levitsky wrote:
>> Hi,
> 
> Hi,
> 
>> If I suspend system to ram twice, the system hangs on resume.
>>
>> Otherwise system suspends fine.
>>
>> I can do the following:
>>
>> suspend to disk
>> suspend to disk
>> suspend to ram
>> suspend to disk
>> suspend to ram
>> suspend to disk
>> suspend to disk.
>>
>> but not this:
>>
>> suspend to ram
>> suspend to ram.
>> <-> hang
>>
>>
>> Before I start digging deeper, are there patches floating around that 
>> could fix this issue?
>>
>> (I use latest linus -git kernel)
>>
>> (I tried to use minimal system and got same results)
>>
>> Have to confess that I use nvidia binary drivers, and without them
>> video doesn't resume, but I did test this issue without them, and
>> got same results.
>>
>> (after first suspend to ram video didn't resume, but I was able to 
>> control the system with keyboard, and I then put it to sleep again, and 
>> on resume, system didn't respond.)
> 
> Hard to say what the problem is.  If it's a regression (ie. you have a kernel
> that works 100% of the time) and is readily reproducible, bisection may help
> find the patch that broke it.
> 
> Thanks,
> Rafael

Sadly it isn't a regression (I bought this laptop just few weeks ago)
I can try older kernels, I just asked whenever there are some known 
bugfixes for me to try.

I will dig this bug out,

Best regards,
	Maxim Levitsky