Re: vbetool on pure AMD64 system

[Phillip Susi <psusi-3tLf1voIkJTQT0dZR+AlfA@public.gmane.org>]

When you say that vm86 is not supported on x86-64, what do you mean 
exactly?  I'm pretty sure that the hardware supports it, and I don't see 
how the vesa frame buffer Xorg driver works without it.  If the hardware 
supports v86 mode, why wouldn't the kernel?

For the OP: you might check if your bios has an option to repost the 
video bios on S3 resume.  I turned that on in my bios and that fixed 
this problem for me.  You also might try switching consoles after the 
resume, for instance, by pressing ctrl-alt-F1, then ctrl-alt-F7 ( or 
whichever tty the X server is on ) to switch back to X.  That sometimes 
will reset the video state.

Pavel Machek wrote:
> Hi!
> 
>> due to your work in new kernels, my AMD64-laptop now resumes after an ACPI S3 
>> suspend (I can type commands and they get executed) :-). Thanks a lot.
>>
>> But the LCD stays black. So I read about the various options to reinitialize 
>> the VGA, which were:
>> 1. kernel boot options: acpi=s3_sleep, acpi=s3_mode, pci=routeirq. I tried 
>> each one of them, LCD still stays black.
>> 2. Using the vbetool to save/restore the state of the VGA.
>>
>> Here is the problem: I didn't find an AMD64 version of vbetool (using Debian 
>> testing AMD64), so I forced the i386 package and manually met its 32bit 
>> dependencies. It does run, and the "vgastate off" option does disable the 
>> LCD. But saving and restoring the state, I get the following error:
>>
>> # vbetool vbestate save > /tmp/save
>> Can't get video state buffer size (vm86 failure)
>> Get video state buffer size failed
>> Can't save video state (vm86 failure)
>> Save video state failed
> 
> vm86 is unsupported on x86-64. Something like qemu will be required
> :-(.
> 								Pavel



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