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RE: [Xen-devel] X11_EnterFullScreen fails

To: "Petersson, Mats" <Mats.Petersson@xxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] X11_EnterFullScreen fails
From: "Jayant Mangalampalli" <Jayant_Mangalampalli@xxxxxxxxxxx>
Date: Wed, 30 May 2007 21:50:39 +0530
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Thread-topic: [Xen-devel] X11_EnterFullScreen fails
Highly likely. Unfortunately we cannot salvage any data during crash.
But I think this is a great pointer, especially since I am also facing
problems trying to get TinyX to start in the graphics mode - but the
vesafb driver tries to access the BIOS and it fails for exactly the same
reason (it is in protected mode by that time). The result is, however,
not a crash but a flimsy looking "text mode" like screen.


-----Original Message-----
From: Petersson, Mats [mailto:Mats.Petersson@xxxxxxx] 
Sent: Wednesday, May 30, 2007 9:38 PM
To: Jayant Mangalampalli; xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: RE: [Xen-devel] X11_EnterFullScreen fails


> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Jayant Mangalampalli
> Sent: 30 May 2007 17:05
> To: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-devel] X11_EnterFullScreen fails
> I am trying to set the guest window to full-screen mode but 
> the domain consistently crashes when I try to do that. The 
> problem could be traced to a point where X11-driver used by 
> SDL itself fails. Here is the call trace before system 
> crashes (most recent call last):
> SDL_video.c::SDL_SetVideoMode() makes a call to 
> video->SetVideoMode(). (We use X11 video driver)
> video->SetVideoMode() = SDL_x11video.c::X11_SetVideoMode()
> The above makes a call to SDL_x11video.c::X11_ResizeWindow() 
> which makes a call to X11_EnterFullScreen() (in SDL_x11modes.c)
> X11 does support full-screen mode and I am unable to 
> understand why it is initiated by xen. Has anyone tried this?

What's the crash symptoms? Is it possible that the X11 driver is calling
the BIOS, and that this fails in Xen due to restrictions on running
real-mode, which doesn't happen in native mode?

> Thanks,
> Jayant Mangalampalli

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