Xen project Mailing List

Casey DeLorme, I noticed what you have said... it works for me only for the first time (dom0 just booted).

Peter Maloney, I did not know that xm destroy and xm create could make things work again! But it got me thinking, cause I'm passing thru a USB controller FLR disabled.

Let me try this: I'll prepare another installation with fedora 18, install xen from RPM (since I downloaded the unstable source code, rev 26667), and start over without passingthru everything that I wanted at once (just the VGA) to see what happens.

I'm gonna do this, installing from RPM, based on what the wiki says (secondary VGA passthru will work out-of-box). I'll let you guys know...

grr Thunderbird doesn't cc everyone when I hit "reply list", sorry for the double message if you got 2.

On 2013-03-05 09:35, Peter Maloney wrote:

A few things I can add...

My card is a Sapphire Radeon HD 6770. And I'm currently using catalyst version 12-10.

I *never* got windows xp to use the passed through gfx card unless I set "stdvga=1" (which means to replace the cirrus logic card (that works in winxp) with another (that doesn't work in xp), so it then uses the secondary gpu like I wanted. Win7 and 8 work without this. (and FYI xp is the worst performer by far, maybe from a xen bug that only affects AMD cpus, and 4.2.x is unusably slow in xp, definitely a bug affecting just AMD)

I very rarely get any problem booting and getting graphics to work, and never on the first boot. Every time there is an error, it is from a "restart" (such as a windows update) instead of a "shutdown" and "start", like Casey described. However, when this happens, I can simply "xm destroy ..." and "xm create ..." again, and it works 100%.

I have never needed to reboot dom0 to start a vm, except:
1. to get my USB IRQ to work again in dom0 (without this, my keyboard and mouse are laggy and miss keystrokes). I have passed through a USB controller that lacks FLR, so if the vm dies incorrectly [not a shutdown], dom0 broadcasts that it is disabling an irq. If I start the domu again, the usb works fine in domu, but never dom0 until reboot. (I've only caused this with crashing domu's from kernel oopses from #2, and with gplpv network drivers which never seem to work right for me)
2. testing broken kernels (3.7-rc2, etc. with broken network) (in this case, every domu I try to create after the first problem starts with a blank screen, and vnc usually is blank or just says "parallell0" instead of a console screen)

And last, contradictory to what the others said, win7 gfx passthrough never worked for me without installing the catalyst drivers first in winxp or win7. Win8 worked though, one time even in the installer (depends on whether the monitor is plugged in at the right time I think).

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> On 2013-03-05 05:25, Casey DeLorme wrote:
>>
>> Hello Guilherme, was following your exchange and wanted to see how this turned out.
>>
>> Seco...
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Peter Maloney
Brockmann Consult
Max-Planck-Str. 2
21502 Geesthacht
Germany
Tel: +49 4152 889 300
Fax: +49 4152 889 333
E-mail: peter.maloney@xxxxxxxxxxxxxxxxxxxx
Internet: http://www.brockmann-consult.de
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-- 

--------------------------------------------
Peter Maloney
Brockmann Consult
Max-Planck-Str. 2
21502 Geesthacht
Germany
Tel: +49 4152 889 300
Fax: +49 4152 889 333
E-mail: peter.maloney@xxxxxxxxxxxxxxxxxxxx
Internet: http://www.brockmann-consult.de
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Re: [Xen-users] VGA Passthru - FLR?