Bug 408683 - blank page until I scroll
Summary: blank page until I scroll
Status: RESOLVED WORKSFORME
Alias: None
Product: okular
Classification: Applications
Component: general (show other bugs)
Version: 1.7.1
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: Okular developers
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2019-06-14 10:48 UTC by Con Hennessy
Modified: 2019-07-24 18:23 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:


Attachments
attachment-4909-0.html (1.73 KB, text/html)
2019-06-28 12:52 UTC, Con Hennessy
Details

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Description Con Hennessy 2019-06-14 10:48:19 UTC
SUMMARY
Since I can remember when I open a PDF in okular, for every document the page is initially blank when scrolled.

STEPS TO REPRODUCE
1. open a multi-page pdf 
2. scroll down to see the beginning of the next page
3. stop to admire the blank beginning of the page
4. scroll until the top of the (blank) page disappears
5. as soon as the page "magically" reveals itself, scroll back up to see the actual content. 

OBSERVED RESULT
when scrolling a page is blank until I scroll past the top of the page, at which point the page is generally rendered and I have to scroll back up

EXPECTED RESULT
The page is rendered as I scroll downwards

SOFTWARE/OS VERSIONS
latest from opensuse

ADDITIONAL INFORMATION
using other tools to view pdfs works, e.g. chrome or firefox
Comment 1 Albert Astals Cid 2019-06-14 12:08:58 UTC
SOFTWARE/OS VERSIONS
latest from opensuse

This is useless information
Comment 2 Con Hennessy 2019-06-14 13:18:03 UTC
Okular 1.7.1
KDE Frameworks 5.58.0
Qt 5.12.3 (built against 5.12.3)
The xcb windowing system

On opensuse tumbleweed updated about 1 week ago.

On Fri, 14 Jun 2019 at 13:09, Albert Astals Cid
<bugzilla_noreply@kde.org> wrote:
>
> https://bugs.kde.org/show_bug.cgi?id=408683
>
> Albert Astals Cid <aacid@kde.org> changed:
>
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>              Status|REPORTED                    |NEEDSINFO
>                  CC|                            |aacid@kde.org
>          Resolution|---                         |WAITINGFORINFO
>
> --- Comment #1 from Albert Astals Cid <aacid@kde.org> ---
> SOFTWARE/OS VERSIONS
> latest from opensuse
>
> This is useless information
>
> --
> You are receiving this mail because:
> You reported the bug.
Comment 3 Albert Astals Cid 2019-06-17 22:40:30 UTC
Do you have a hidpi screen?
Comment 4 Con Hennessy 2019-06-21 10:27:59 UTC
Yes, my laptop screen and an external monitor (with the placement of the external monitor above the laptop screen).

From xdpyinfo:
screen #0:
  dimensions:    3840x3960 pixels (1016x1047 millimeters)
  resolution:    96x96 dots per inch

From xrandr:
eDP-1 connected primary 3200x1800+144+2160 (normal left inverted right x axis y axis) 294mm x 165mm
DP-1 connected 3840x2160+0+0 (normal left inverted right x axis y axis) 600mm x 340mm
Comment 5 Albert Astals Cid 2019-06-22 11:14:51 UTC
Can you attach the pdf that causes this problem for you?
Comment 6 Con Hennessy 2019-06-28 12:52:06 UTC
Created attachment 121203 [details]
attachment-4909-0.html

On Saturday 22 June 2019 and Albert Astals Cid wrote:
> https://bugs.kde.org/show_bug.cgi?id=408683
> 
> --- Comment #5 from Albert Astals Cid <aacid@kde.org> ---
> Can you attach the pdf that causes this problem for you?

Every PDF, including 
https://20years.kde.org/book/20yearsofKDE.pdf
Comment 7 Bug Janitor Service 2019-07-13 04:33:08 UTC
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!
Comment 8 Christoph Feck 2019-07-13 08:20:30 UTC
Information was provided with comment #6; changing status for inspection.
Comment 9 Albert Astals Cid 2019-07-23 22:05:06 UTC
can you confirm it is just not that the page is being rendered? i.e. the cpu is not at 100% while the page is blank?

Would you be able to use a screen recording tool like Peek and attach a gif of what you get?
Comment 10 Con Hennessy 2019-07-24 11:43:56 UTC
I just tested this problem with the file mentioned above, it looks like the problem is resolved. 

I did not do anything explicitly so I assume that there was changes in the underlying application or libraries between 

I recently upgrade to openSUSE Tumbleweed from early June and the current version labelled as 20190718-0.

So from my perspective this issue can now be closed. Thank you for whatever you may have done, and all of the efforts you have put into the suit of applications.