commit 0a02ff4a4602f09bae25f3a8e9b971b32bbee2ca
Author: Kåre Särs <kare.sars@iki.fi>
Date:   Wed Feb 15 21:24:14 2012 +0200

    Apply Gregor Horst's patch to stop polling while a scan is ongoing
    
    BUG: 294073

diff --git a/libksane/ksane_widget_private.cpp b/libksane/ksane_widget_private.cpp
index 055976e..9872c40 100644
--- a/libksane/ksane_widget_private.cpp
+++ b/libksane/ksane_widget_private.cpp
@@ -1023,11 +1023,15 @@ void KSaneWidgetPrivate::setBusy(bool busy)
         m_warmingUp->show();
         m_activityFrame->hide();
         m_btnFrame->hide();
+        m_optionPollTmr.stop();
     }
     else {
         m_warmingUp->hide();
         m_activityFrame->hide();
         m_btnFrame->show();
+        if (m_pollList.size() > 0) {
+            m_optionPollTmr.start();
+        }
     }
     
     m_optsTabWidget->setDisabled(busy);