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From: | Andriy Gapon |
Subject: | [Qemu-devel] broken screendump for text mode? |
Date: | Tue, 30 Aug 2011 19:50:30 +0300 |
User-agent: | Mozilla/5.0 (X11; FreeBSD amd64; rv:5.0) Gecko/20110705 Thunderbird/5.0 |
I use Qemu 0.15.0 (via a FreeBSD qemu-devel-0.15.0 port) and observe the following problem with the screendump command. Environment: - qemu started with a standard vga adapter emulation (not sure if this important) - SDL interface is used (not sure if this important) - guest operating system uses the text mode - monitor console is activated with Ctrl+Alt+2 - screendump command is executed in the monitor console I observe the following effects in this case: - contents of the guest screen is "dumped" over the monitoring console - produced ppm file has only a single top-most line (of characters) from the guest screen It seems that the problem is caused in the vga_draw_text function in hw/vga.c. The problem is that the dpy_update function is called for each line of text and only the first of such calls produces the ppm output. Perhaps in the case when full_update is true there should only be a single dpy_update call for the whole screen. I think that this should produce a complete screen dump. Not sure if that would help with the guest screen contents being draw over the monitor console. Thank you. -- Andriy Gapon
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