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[Qemu-discuss] libdrm framebuffer applications not updating

From: Fernando Rodriguez
Subject: [Qemu-discuss] libdrm framebuffer applications not updating
Date: Fri, 14 Apr 2017 11:47:46 -0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0


I'm working on a framebuffer application (currently using a DirectFB driver) and I'm writing a libdrm driver for it. When using the DRM driver the display window does not get updated until I use CTRL-TAB to switch the active window. That is with the GTK+ qemu backend and the qxl driver. With the SDL backend the window does not update at all, even when switching. When using DirectFB (fbdev backend) everything works as it should with the GTK+ interface and QXL driver.

The problem can be reproduced with the libdrm examples found here:

I'm using a Gentoo box with intel graphics.

Any suggestions?

Thanks in advance,

Fernando Rodriguez

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