libreoffice slow on screen scroll and retries the scroll several times

Bug #794900 reported by indium on 2011-06-09
This bug affects 4 people
Affects Status Importance Assigned to Milestone
libreoffice (Ubuntu)

Bug Description

Binary package hint: libreoffice

When I have word document opened in libreoffice for more than a day, after that time the scrolling of the scroll bar takes a minute to finish. Redrawing the screen seems to fail, in the sense that subsequent sentences are overlapping (showing only half of one of them)
I cannot produce a screenshot, because the process consumes more than 50% cpu. To describe what happens, imagine a scroll of half a page or so: it start the scroll, hampers on redrawing the bottom lines (when scrolling down), then finishes after about 10 seconds with >50% cpu activity. When it reaches its 'destination', it restarts from the beginning (top) and show the same behaviour several times.

I have this problem with a word .doc file and adding comments to text, but I do not know if this is related.

I have switched off the 'java' option in the preferences (having read about that solving the problem somewhere), but that doesn't help.

closing and reopening the document resolves the problem: fast response to scrolling the mouse.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: libreoffice-core 1:3.3.2-1ubuntu5
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: nvidia wl
Architecture: amd64
Date: Thu Jun 9 10:04:24 2011
ExecutablePath: /usr/lib/libreoffice/program/soffice.bin
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
 PATH=(custom, user)
SourcePackage: libreoffice
UpgradeStatus: Upgraded to natty on 2011-05-05 (34 days ago)

indium (indium) wrote :
Changed in libreoffice (Ubuntu):
status: New → Incomplete
status: Incomplete → New
status: New → Incomplete
status: Incomplete → New
indium (indium) wrote :

I just noticed that the jumping up and down when scrolling, as described above (starting point to 'destination' and back), also occurs without the >50% cpu load: it is because the text cursor is still inside a comment in the word document. This restricts Libreoffice to leave that page somehow. The comment has to stay visually in the screen and you can scroll only sofar as the size of the comment "block" allows you.

The bug for >50% cpu load on scrolling still holds: it occurs after having the document open for >24h.

indium, thank you for reporting this bug and helping make Ubuntu better. Could you please attach the .doc that demonstrates this problem?

Changed in libreoffice (Ubuntu):
status: New → Incomplete
Launchpad Janitor (janitor) wrote :

[Expired for libreoffice (Ubuntu) because there has been no activity for 60 days.]

Changed in libreoffice (Ubuntu):
status: Incomplete → Expired

indium, we are closing this bug report because it lacks the information we need to investigate the problem, as described in the previous comments. Please reopen it if you can give us the missing information, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to "New". Thanks again!

Changed in libreoffice (Ubuntu):
status: Expired → Invalid
Dereck Wonnacott (dereck) wrote :

This happens on my system as well with any document. I frequently leave my laptop suspended with whatever I was working on open. The next day I always have to close all of my documents and reopen them to make Writer usable again.

Ubuntu 11.04 - Stock LibreOffice Installation

Changed in libreoffice (Ubuntu):
status: Invalid → Confirmed
importance: Undecided → Medium
Dereck Wonnacott (dereck) wrote :

Something else that I just noticed;

I had two documents open over the past night, I created both about the same time around 11pm according to the file's modified timestamp. One had about 3 pages of text, the other had three words.

Today at 1:22, the first and larger document exhibited the usual choppy scrolling behavior and the other did not. I closed the first document before I came across this observation.

I'll try to keep notes here on what I'm noticing, perhaps there will be some nugget of useful information. This bug annoys me greatly...

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