Re: [Qemu-devel] [6989] Fix display breakage when resizing the screen (v2) (Avi Kivity)

[Avi Kivity <avi@redhat.com>]

Stefano Stabellini wrote:
> I tried several times to manually reproduce the issue with no luck: if
> no vnc clients are supposed to be connected, how do you make the cirrus
> emulated hw do a bitblit?
>   

The guest will boot and do it by itself.

> In any case it makes sense that the problem is in qemu_console_copy()
> rather than in the rop function itself that only operates on the
> emulated framebuffer.
> But calling qemu_console_copy() in cirrus_do_copy() shouldn't be risky
> because before that, we call vga_hw_update() that should do the resize.
>   

vga_hw_update() may not actually do anything if the conditions are 
right, and maybe that's the case here.

> Without a better understanding of the bug I will refrain from making any
> suggestion.
>
>   

There's a backtrace in 
https://bugzilla.redhat.com/show_bug.cgi?id=494002.  I'll also try to 
generate a good scenario for reproducing this.

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.