Re: BUG: blank screen - unless keyboard/synaptic combo

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is this a regression or it exists on all the kernel you've tried?
please remote login the box after resume, and get the output of
"xrandr --verbose".

thanks,
rui

On Fri, 2009-05-22 at 06:58 +0800, Niel Lambrechts wrote:
> Cc's added, attached lspci output.
> 
> On 05/19/2009 08:38 PM, Niel Lambrechts wrote:
> > I have a strange problem in that during a resume from hibernate my
> > text console (or X) remains blank - that is, until I simultaneously
> > press a keyboard key and touch the synaptic pad. It is not sufficient
> > to press just one or the other, it needs to be done simultaneously and
> > it resumes fine after doing this.
> 
> I have tried quite hard to overcome this issue. All of the following hibernation 
> tests I tried involved booting into a text console, without ever starting X. 
> With each test I still had a blank screen upon resume, and each time it was 
> fully recoverable by pressing any keyboard key/synaptic pad touch combo.
> 
> 1. Disabling a CPU core - NO CHANGE.
> Based on a "multi-processor concurrency" fix mentioned on the web (Ubuntu bug 
> #272307).
> 
> 2. Upgrade BIOS to latest level - NO CHANGE.
> BIOS 6FET70WW, released 04/17/2009.
> 
> 3. Switching to ATI Mobility Radeon HD 3650 graphics card. NO CHANGE.
> My Lenovo W500 has "switchable graphics" BIOS option, and I tried this test with 
> both the integrated or the above-mentioned card without difference.
> _This result seems quite interesting to me, as if it could be some type of bus 
> related freeze where the keyboard/synaptic combo plays a role._
> 
> 4. Disabling BIOS Options - NO CHANGE.
> Enabling/disabling security chip features + TXT features.
> Disabling fingerprint reader.
> Disabling memory security feature.
> 
> 5. Kernel options - NO CHANGE.
> ACPI debugging - I enabled CONFIG_ACPI_DEBUG, but did not see any messages 
> generated when I pressed a keyboard key + synaptic mousepad combo that recovers 
> the console.
> FIRMWARE_EDID - still testing this.
> 
> Any suggestions on anything else I could try would be most welcome...!
> 
> Thanks,
> Niel
> 

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