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colinpdavidson
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Joined: 02 Jun 2009
Posts: 18

PostPosted: Thu Aug 18, 2011 2:12 pm    Post subject: Problem running kvm Reply with quote

Hi,

Before a recent update I was running windows 95 under kvm without any serious problems. After the update, I keep getting "no display found". I downloaded the latest stabel qemu/kvm code and got the same problem. I traced through it and found that SDL_Init() was failing. Downloaded the latest stable SDL, tried that and got the same problem. Traced through, tried several different environments, it always came down to XOpenDisplay(null) - whatever my environment, XOpenDisplay is passed a "null" parameter - returning a null.

So, three questions:

First, I know the sources are already on my system - how can I get a debug build using the Gentoo sources (is there an emerge command line parameter that causes a debug build to be installed, with the sources left in their build location? or is there another reasonable approach?).

Next question, I have roughly five parties involved here, the Gentoo integration, the SDL developers, the Qemu developers, the kvm developers (who piggy-back on Qemu) and the Xorg developers. Now, seeing where the problem is happening, I think I can rule out the kvm developers. But which of the others should I be talking to? Is it likely to be a Qemu failure to initialize something? An SDL failure to initialize something? An Xorg problem? A Gentoo integration issue? A misconfiguration on my part??

Third question, does anyone have any idea what I need to do to get kvm running again?

Additional info: It happens whether I run kvm with sudo or su to a root shell and run kvm there.

Thanks in advance,
Colin
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Aquous
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Joined: 08 Jan 2011
Posts: 700

PostPosted: Thu Aug 18, 2011 2:35 pm    Post subject: Reply with quote

To get a meaningful backtrace with gdb, add "-ggdb -fno-omit-frame-pointer" to your CFLAGS and remove any excessive optimizations and have FEATURES=splitdebug.

Also try starting KVM with sudo -E
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