org-drill problem: questions are blank

org-drill problem: questions are blank

[Peter Westlake]

From time to time Org-drill shows me a blank window instead of a
question. The frame, mode line and prompt to answer are visible, but
there's nothing in the window at all. As a workaround I can type "t" to
edit the tags, and the question will appear.

A sample file is enclosed. It's a new file without any of the org-drill
property drawers just to keep the example short and to avoid having to
wait for the question to be scheduled to be shown again, but the problem
*does* still happen when the drawers are present.

To reproduce the bug, run org-drill in drillbug.org; the question "MC"
gives a blank screen.

I'm using org-drill with the latest version of Org-mode, git commit
2f58e3c011ec84f621905332d8df68b83da580d9, on Emacs 24.3.1, 2014-09-30.

Peter.

Re: org-drill problem: questions are blank

[J. David Boyd]

Peter Westlake <peter.westlake@pobox.com> writes:

> From time to time Org-drill shows me a blank window instead of a
> question. The frame, mode line and prompt to answer are visible, but
> there's nothing in the window at all. As a workaround I can type "t" to
> edit the tags, and the question will appear.
>
> A sample file is enclosed. It's a new file without any of the org-drill
> property drawers just to keep the example short and to avoid having to
> wait for the question to be scheduled to be shown again, but the problem
> *does* still happen when the drawers are present.
>
> To reproduce the bug, run org-drill in drillbug.org; the question "MC"
> gives a blank screen.
>
> I'm using org-drill with the latest version of Org-mode, git commit
> 2f58e3c011ec84f621905332d8df68b83da580d9, on Emacs 24.3.1, 2014-09-30.
>
> Peter.

There's no attached file...

Re: org-drill problem: questions are blank

[Peter Westlake]

[-- Attachment #1: Type: text/plain, Size: 1001 bytes --]

On Thu, 26 Mar 2015, at 17:26, J. David Boyd wrote:
> Peter Westlake <peter.westlake@pobox.com> writes:
> 
> > From time to time Org-drill shows me a blank window instead of a
> > question. The frame, mode line and prompt to answer are visible, but
> > there's nothing in the window at all. As a workaround I can type "t" to
> > edit the tags, and the question will appear.
> >
> > A sample file is enclosed. It's a new file without any of the org-drill
> > property drawers just to keep the example short and to avoid having to
> > wait for the question to be scheduled to be shown again, but the problem
> > *does* still happen when the drawers are present.
> >
> > To reproduce the bug, run org-drill in drillbug.org; the question "MC"
> > gives a blank screen.
> >
> > I'm using org-drill with the latest version of Org-mode, git commit
> > 2f58e3c011ec84f621905332d8df68b83da580d9, on Emacs 24.3.1, 2014-09-30.
> >
> > Peter.
> 
> There's no attached file...

Ugh! There is now, sorry.

Peter.
 

[-- Attachment #2: drillbug.org --]
[-- Type: application/vnd.lotus-organizer, Size: 729 bytes --]

Re: org-drill problem: questions are blank

[Marco Wahl]

Peter Westlake <peter.westlake@pobox.com> writes:

> On Thu, 26 Mar 2015, at 17:26, J. David Boyd wrote:
>> Peter Westlake <peter.westlake@pobox.com> writes:
>> 
>> > From time to time Org-drill shows me a blank window instead of a
>> > question. The frame, mode line and prompt to answer are visible, but
>> > there's nothing in the window at all. As a workaround I can type "t" to
>> > edit the tags, and the question will appear.
>> >
>> > A sample file is enclosed. It's a new file without any of the org-drill
>> > property drawers just to keep the example short and to avoid having to
>> > wait for the question to be scheduled to be shown again, but the problem
>> > *does* still happen when the drawers are present.
>> >
>> > To reproduce the bug, run org-drill in drillbug.org; the question "MC"
>> > gives a blank screen.
>> >
>> > I'm using org-drill with the latest version of Org-mode, git commit
>> > 2f58e3c011ec84f621905332d8df68b83da580d9, on Emacs 24.3.1, 2014-09-30.
>> >
>> > Peter.
>> 
>> There's no attached file...
>
> Ugh! There is now, sorry.

Thanks!  I can reproduce your issue with a relatively fresh emacs 25 and
org from git.

AFAICS the window gets blanked sometimes in function
org-toggle-latex-fragment of org.el in line

--8<---------------cut here---------------start------------->8---
;; Work around a bug that doesn't restore window's start
;; when widening back the buffer.
(set-window-start nil window-start)
--8<---------------cut here---------------end--------------->8---

A workaround would be to comment out just this line.

I don't know if this is a reliable fix though.


HTH
-- 
http://www.wahlzone.de
GPG: 0x49010A040A3AE6F2

Re: org-drill problem: questions are blank

[Peter Westlake]

Marco,

Thanks for the suggestion, but this doesn't make the bug go away for me.

Peter.

On Sun, 29 Mar 2015, at 19:54, Marco Wahl wrote:
> Peter Westlake <peter.westlake@pobox.com> writes:
> 
> > On Thu, 26 Mar 2015, at 17:26, J. David Boyd wrote:
> >> Peter Westlake <peter.westlake@pobox.com> writes:
> >> 
> >> > From time to time Org-drill shows me a blank window instead of a
> >> > question. The frame, mode line and prompt to answer are visible, but
> >> > there's nothing in the window at all. As a workaround I can type "t" to
> >> > edit the tags, and the question will appear.
> >> >
> >> > A sample file is enclosed. It's a new file without any of the org-drill
> >> > property drawers just to keep the example short and to avoid having to
> >> > wait for the question to be scheduled to be shown again, but the problem
> >> > *does* still happen when the drawers are present.
> >> >
> >> > To reproduce the bug, run org-drill in drillbug.org; the question "MC"
> >> > gives a blank screen.
> >> >
> >> > I'm using org-drill with the latest version of Org-mode, git commit
> >> > 2f58e3c011ec84f621905332d8df68b83da580d9, on Emacs 24.3.1, 2014-09-30.
> >> >
> >> > Peter.
> >> 
> >> There's no attached file...
> >
> > Ugh! There is now, sorry.
> 
> Thanks!  I can reproduce your issue with a relatively fresh emacs 25 and
> org from git.
> 
> AFAICS the window gets blanked sometimes in function
> org-toggle-latex-fragment of org.el in line
> 
> --8<---------------cut here---------------start------------->8---
> ;; Work around a bug that doesn't restore window's start
> ;; when widening back the buffer.
> (set-window-start nil window-start)
> --8<---------------cut here---------------end--------------->8---
> 
> A workaround would be to comment out just this line.
> 
> I don't know if this is a reliable fix though.
> 
> 
> HTH
> -- 
> http://www.wahlzone.de
> GPG: 0x49010A040A3AE6F2
> 
> 

Re: org-drill problem: questions are blank

[Marco Wahl]

Hi Peter,

Peter Westlake <peter.westlake@pobox.com> writes:

> Thanks for the suggestion, but this doesn't make the bug go away for
> me.

That's awkward.  

Just to be sure: did you evaluate the function after changing the line
in function org-toggle-latex-fragment of org.el to

; (set-window-start nil window-start)

?  I ask since this fixed the issue for me and to not give up too early.


                                          Marco
-- 
http://www.wahlzone.de
GPG: 0x49010A040A3AE6F2

Re: org-drill problem: questions are blank

[Peter Westlake]

On Mon, 30 Mar 2015, at 17:54, Marco Wahl wrote:
> Hi Peter,
> 
> Peter Westlake <peter.westlake@pobox.com> writes:
> 
> > Thanks for the suggestion, but this doesn't make the bug go away for
> > me.
> 
> That's awkward.  
> 
> Just to be sure: did you evaluate the function after changing the line
> in function org-toggle-latex-fragment of org.el to
> 
> ; (set-window-start nil window-start)
> 
> ?  I ask since this fixed the issue for me and to not give up too early.

Yes, I even restarted Emacs.

Peter.

Re: org-drill problem: questions are blank

[Marco Wahl]

Peter Westlake <peter.westlake@pobox.com> writes:

> On Mon, 30 Mar 2015, at 17:54, Marco Wahl wrote:
>> Hi Peter,
>> 
>> Peter Westlake <peter.westlake@pobox.com> writes:
>> 
>> > Thanks for the suggestion, but this doesn't make the bug go away for
>> > me.
>> 
>> That's awkward.  
>> 
>> Just to be sure: did you evaluate the function after changing the line
>> in function org-toggle-latex-fragment of org.el to
>> 
>> ; (set-window-start nil window-start)
>> 
>> ?  I ask since this fixed the issue for me and to not give up too early.
>
> Yes, I even restarted Emacs.

Did you byte-compile org.el then?

Re: org-drill problem: questions are blank

[Peter Westlake]

On Mon, 30 Mar 2015, at 18:08, Marco Wahl wrote:
> Peter Westlake <peter.westlake@pobox.com> writes:
> 
> > On Mon, 30 Mar 2015, at 17:54, Marco Wahl wrote:
> >> Hi Peter,
> >> 
> >> Peter Westlake <peter.westlake@pobox.com> writes:
> >> 
> >> > Thanks for the suggestion, but this doesn't make the bug go away for
> >> > me.
> >> 
> >> That's awkward.  
> >> 
> >> Just to be sure: did you evaluate the function after changing the line
> >> in function org-toggle-latex-fragment of org.el to
> >> 
> >> ; (set-window-start nil window-start)
> >> 
> >> ?  I ask since this fixed the issue for me and to not give up too early.
> >
> > Yes, I even restarted Emacs.
> 
> Did you byte-compile org.el then?

That's the thing I always forget. That does appear to work now, thank
you!

Peter.