#4164 NORM Never A: Journal scrolling seen incomplete and decoupled from scrollbar

[Zarro Boogs per Child]

#4164: Journal scrolling seen incomplete and decoupled from scrollbar
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 Reporter:  MitchellNCharity  |       Owner:  tomeu         
     Type:  defect            |      Status:  new           
 Priority:  normal            |   Milestone:  Never Assigned
Component:  journal-activity  |     Version:                
 Keywords:                    |    Verified:  0             
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 616 q2c28 B4.
 I've a USB stick with all ~120 gcompris in one directory, some old roms
 and images in another, boot/, and minor other cruft.  Viewed in Journal,
 the scrollbar becomes variously decoupled from window contents and
 movement.

 Inserted stick.  In Journal, usb icon appeared.  Clicked on it.  I
 observed the following intermittent bugs:
 -Scrolling to the bottom doesn't seem to show all the items.  They are
 roughly alphabetically ordered.  Only got down to the g's.  Later, got
 down to the a's.  Later still, only got down to the g's again.
 -Scroll to the top.  Main window doesn't seem to be showing top.  Move
 cursor.  No change in screen.  Repeat, moving the cursor in small steps,
 to ~1/4 way down screen.  Still no change.  Moved cursor in much larger
 step, usb flickered, and main window finally updated.

 I found no recipe for recreating either, but they reoccurred repeatedly
 over a few minutes.

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Ticket URL: <https://dev.laptop.org/ticket/4164>
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