Bug 17930

(I'm the original reporter--to Ubuntu--of the bug.)

Rotation 90° does work alright if I change, before logging in (in GNOME), the session such that no start scripts are executed. It does not seem that anything is missing afterwards.
Michael

Michael, is this a suggested fix, or just an observation?  What could be in the startup scripts that could hang the X server so badly, I wonder?

It is an obvservation. I have no idea why this comes out -- I am a Newcomer to unbuntu!
Michael 

bugzilla-daemon@freedesktop.org schrieb:
> http://bugs.freedesktop.org/show_bug.cgi?id=17930
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> --- Comment #3 from Mike Coleman <tutufan@gmail.com>  2008-10-06 12:43:52 PST ---
> Michael, is this a suggested fix, or just an observation?  What could be in the
> startup scripts that could hang the X server so badly, I wonder?
>
>
>   
It is an obvservation. I have no idea why this comes out -- I am a 
Newcomer to unbuntu!
Michael

Hi Bryce!

I knew we'd have to meet here sooner or later.

I tried to take a look at this bug and here's some of what I found:

* With fairly current, (master within the last couple of weeks at least), X server and xf86-video-intel, I tried various combination of rotation and applications. I rotated both before and after starting GNOME. I ran totem with visualization as well as mplayer rendering with xv, (since the original referenced bug seems to point to problems with xv). And everything worked fine for me---I couldn't find any problems.

* I talked with Keith Packard, and he says that all the rotation code takes place in generic parts of the X server, and the driver should be totally unaware of things. That makes the "starting in around 2.3.1" part of the bug report suspicious. Did the bug really change with xf86-video-intel 2.3.1 or did other things change at the same time?

Since I can't reproduce the bug yet, I'll need some more information from those who can. Specifically, if you can take a broken setup and make it work by switching only the Intel driver, (back to 2.2, say), then that would be very useful information.

Also, if you could update to 2.4 (or even a recent 2.4.9x release candidate for our imminent 2.5 release), and report if things start working for you, that would be great.

Thanks,

-Carl

Heya Carl,

@Mike and Michael, can both of you please try what Carl suggests and re-test for this bug against more recent code?  You can get an ISO of intrepid-beta at http://cdimage.ubuntu.com/releases/8.10/beta/.

I just updated to the next Ubuntu beta, which is at

ii  xserver-xorg-video-intel                   2:2.4.1-1ubuntu6                      X.Org X server -- Intel i8xx, i9xx display d

First off, basic rotation seems to work fine, and furthermore the Ubuntu "visual effects" also seem to work while rotated, which has not worked for me up to this point.  So in this sense, this version is the best ever.  (Hooray!)

3D acceleration (still) does not work correctly, though.  If "visual effects" is not enabled, then the GL window is either black or frozen, except that if I grab the window and move it around, it seems to work perfectly until I stop.  So I guess there's some sort of updating problem.  (The behavior is slightly different between glxgears vs the Ubuntu screensaver preview window.  The former starts in an almost working state, but with a black bar across the top 20% of the window; then, when I touch it, it's frozen while still and works while the window is moving.  The latter starts black, and then likewise once touched is frozen unless the window is in motion (i.e., being moved with the mouse).

If "visual effects" is enabled, the effect looks more complex.  Things only work while the window is being dragged, as above, but the rendering is not correct in this case, and leaves strips of rendered material outside the dragged window.

(In reply to comment #8)
> I just updated to the next Ubuntu beta, which is at
> 
> ii  xserver-xorg-video-intel                   2:2.4.1-1ubuntu6                
>      X.Org X server -- Intel i8xx, i9xx display d


Thanks for trying with newer packages, Mike!

> First off, basic rotation seems to work fine, and furthermore the Ubuntu
> "visual effects" also seem to work while rotated, which has not worked for me
> up to this point.  So in this sense, this version is the best ever.  (Hooray!)

Excellent news.

This particular bug report is about the rotation. So since everything is working correctly, I'll go ahead and mark this bug as fixed. If you do see other issues with rotation, please feel free to reopen the bug.
 
> 3D acceleration (still) does not work correctly, though.

This is in general, right? Not only when rotated? If so, then it would be most helpful if you could open separate bug reports for each separate issue. (For example, I'm not the right person to help with any 3D issues at all.)

Thanks again for your testing and bug reporting. We really appreciate it!

-Carl

>> 3D acceleration (still) does not work correctly, though.

> This is in general, right? Not only when rotated? If so, then it would be most
> helpful if you could open separate bug reports for each separate issue. (For
> example, I'm not the right person to help with any 3D issues at all.)

I hadn't tried until you asked, but 3D seems to work fine when the display is not rotated, at least when "visual effects" are not enabled.  (It'd be more difficult for me to check the "visual effects" enabled case, but I can if it actually matters here.)

So, yes, I think there is a still a rotation bug.  Whether it's the same bug I will leave as a question to the philosophers.  :-)

Thanks for your work on this--even in its current state this definitely made my day!

(In reply to comment #10)
> So, yes, I think there is a still a rotation bug.  Whether it's the same bug I
> will leave as a question to the philosophers.  :-)

This should be a different bug, so please file a new bug.
You could also try http://bugs.freedesktop.org/show_bug.cgi?id=17967#c9 to see if vblank_mode impacts your 3d issue.