On 01/06/2010 07:51 AM, Marcelo Tosatti wrote:
On Tue, Jan 05, 2010 at 04:11:26PM +0000, Mark Cave-Ayland wrote:
Hi all,
Having just upgraded from kvm-85 to qemu-kvm-0.12.1.1 on one of our
servers, I've noticed that I am seeing block artefacts when connecting
using VNC to the graphical VGA console of a WinXP guest.
Looking at the VNC output, what I am seeing is that instead of updating
some parts of the screen which require a redraw, they are just being
replaced by light grey blocks of around 16x16 pixels. Generally, but not
always, several of these blocks appear in a row. Moving the mouse over
the relevant sections of the screen causes them to be redrawn correctly.
I've tried this using both the cirrus and vga drivers, switching between
16/24/32 bit colour and also different resolutions and unfortunately the
effect still remains :( Is there anything else I can do to help try and
debug this? Again this is on an x86_64 Debian Lenny host with a 2.6.32.2
kernel on Intel.
Mark,
Can you confirm that reverting commit
02c2b87fff97e77a1f6033fb09f53afa267c0c1e fixes the problem? (patch
attached).
Anthony: its reproducible with upstream/tcg.
What about just adding back this bit:
@@ -165,6 +165,8 @@ static void CONCAT(send_hextile_tile_, NAME)(VncState *vs,
irow += ds_get_linesize(vs->ds) / sizeof(pixel_t);
}
+ /* A SubrectsColoured subtile invalidates the foreground color */
+ *has_fg = 0;
if (n_data> (w * h * sizeof(pixel_t))) {
n_colors = 4;
flags = 0x01;
I think I can rationalize why that would be needed.
Regards,
Anthony Liguori
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