Re: [Qemu-devel] [Bug 1087974] [NEW] [regression] vnc tight png produces garbled output

[Stefan Hajnoczi]

On Sat, Dec 8, 2012 at 12:46 PM, Tim Hardeck <address@hidden> wrote:
> Public bug reported:
>
> VNC Tight PNG compression did work fine two or three month ago but don't 
> anymore. Now when Tight PNG is used parts of the desktop are shown but they 
> are scrambled together.
> I have always tested this feature against QEMU git with noVNC by only 
> allowing Tight PNG compression.

Hi Tim,
If you have a few minutes please use git-bisect(1) to identify the
commit that causes the regression.

The rough steps are:
1. Verify that qemu.git/master is broken and find an older commit
where it works.
2. Use git-bisect(1) to binary search the commit history between these
two points - it will leave you with the commit that caused the
regression.

Here some quick links to get you started:
http://git-scm.com/book/en/Git-Tools-Debugging-with-Git#Binary-Search
http://blog.evan.pro/getting-started-with-git-bisect-in-60-seconds

Stefan