Re: [9fans] Parallels Vesa driver question

[Daniel Lyons <fusion@storytotell.org>]

On Aug 2, 2009, at 3:41 PM, erik quanstrom wrote:

>> Erik,
>>
>> Thanks for your speedy assistance! I think the two things are closely
>> interrrelated via the global variable hardscreen. Reverting this file
>> solved the problem. I wouldn't be surprised if there were something
>> weird about Parallels' MTRR support, and since this isn't the current
>> version it's not likely to get any better. If anyone's using  
>> Parallels
>> 4 and not running into this issue, I'd love to know.
>
> you're welcome.
>
> but if you wouldn't mind, would you try the new source but modify
> it by replacing the vgavesaflush in the following diff with "0"?

Yes, this alone is not sufficient to fix the problem, which I believe  
confirms your suspicion that there is a defect in either Parallel's  
MTRR or Plan 9's Vesa MTRR. My money would be on Parallels, since they  
have a reputation for building the VM to support Windows first.

Again, thanks! Hopefully I'll be able to afford a copy of the new  
version of Parallels in a little while and perhaps that will help  
further isolate the problem.

—
Daniel Lyons