Re: [Xen-devel] HVM domU with sdl not scheduled after vt-switch

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Mon, 2 May 2011, Dietmar Hahn wrote:
> It hangs in qemu in gui_update() -> dpy_refresh() -> sdl_refresh()
> 
> Via libSDL, libX11, libxcb the function xcb_wait_for_reply() gets called.
> 
> It never gets an answer from the Xserver, because the Xserver doesn't answer
> 
> any requests when switching the vt-console.
> 
> Because gui_update() gets called via a qemu timer and never return it stops 
> qemu.
> 

Which one is the SDL call that never returns exactly? SDL_UpdateRect?


> I tried to move the qui_update() into an own thread to get the main qemu loop
> 
> running but then the first call of sdl_update() leads to:
> 
> X Error of failed request: BadAccess (attempt to access private resource 
> denied)
> 
> Major opcode of failed request: 154 (GLX)
> 
> Minor opcode of failed request: 26 (X_GLXMakeContextCurrent)
> 
> Serial number of failed request: 31
> 
> Current serial number in output stream: 31
> 
> and qemu exits.
> 
> I googled a little bit and found XInitThreads() but this doesn't help.
> 
> Any hints are welcome ;-) !
> 

Honestly I don't think any of these solutions are good. It might be
worth sending an email to the libsdl devel mailing list, asking about
this problem.

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