[Pkg-urxvt-maintainers] [Bug 1307775] [NEW] terminal scrolls by updating different regions out-of-sync

[Seth Arnold]

Public bug reported:

urxvt's scrolling behaviour has changed after upgrading to trusty.

Between precise and saucy, scrolling a line at a time in mutt (holding
down enter) or less (also holding down enter) was smooth and easy on the
eyes. In trusty, however, such scrolling is distracting because
different portions of the terminal update at different rates or at
different times. The effect is very 'bouncy'.

Probably the easiest way to see the issue:

Start a urxvt instance
Maximize the urxvt
Run the following command
paste /var/log/syslog /var/log/syslog /var/log/syslog | less
Hold down <enter> to scroll through the content on screen. See if any areas update oddly or otherwise bounce or vibrate.

Compare the scrolling against xterm; on my system, xterm scrolls as
expected. Compare against scrolling with the wheel mouse or two-finger
touch-pad scrolling; on my system, this scrolling is smooth and works as
expected.

Thanks

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: rxvt-unicode 9.19-1
ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
Uname: Linux 3.13.0-23-generic x86_64
ApportVersion: 2.14.1-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Apr 14 18:17:34 2014
InstallationDate: Installed on 2012-10-18 (543 days ago)
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
SourcePackage: rxvt-unicode
UpgradeStatus: Upgraded to trusty on 2014-04-12 (3 days ago)

** Affects: rxvt-unicode (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1307775

Title:
  terminal scrolls by updating different regions out-of-sync

Status in “rxvt-unicode” package in Ubuntu:
  New

Bug description:
  urxvt's scrolling behaviour has changed after upgrading to trusty.

  Between precise and saucy, scrolling a line at a time in mutt (holding
  down enter) or less (also holding down enter) was smooth and easy on
  the eyes. In trusty, however, such scrolling is distracting because
  different portions of the terminal update at different rates or at
  different times. The effect is very 'bouncy'.

  Probably the easiest way to see the issue:

  Start a urxvt instance
  Maximize the urxvt
  Run the following command
  paste /var/log/syslog /var/log/syslog /var/log/syslog | less
  Hold down <enter> to scroll through the content on screen. See if any areas update oddly or otherwise bounce or vibrate.

  Compare the scrolling against xterm; on my system, xterm scrolls as
  expected. Compare against scrolling with the wheel mouse or two-finger
  touch-pad scrolling; on my system, this scrolling is smooth and works
  as expected.

  Thanks

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: rxvt-unicode 9.19-1
  ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
  Uname: Linux 3.13.0-23-generic x86_64
  ApportVersion: 2.14.1-0ubuntu2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Mon Apr 14 18:17:34 2014
  InstallationDate: Installed on 2012-10-18 (543 days ago)
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
  SourcePackage: rxvt-unicode
  UpgradeStatus: Upgraded to trusty on 2014-04-12 (3 days ago)

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