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+---
+layout: post
+category: app
+title: xmobar on debian SID
+---
+
+If you are using "xmonad":http://www.xmonad.org/ and "xmobar":http://code.haskell.org/~arossato/xmobar/ on "debian SID":http://www.debian.org/ on a laptop, and don't see any battery information, you may have test this "solution":http://5e6n1.wordpress.com/2009/03/30/xmobar-battery-plugin-using-sysfs-not-procfs/.
+
+If this didn't solve your problem, try this patch on SysfsBatt.hs :
+
+{% highlight haskell %}
+52c52
+<     let path = sysfsPath ++ p ++ "/charge_full"
+---
+>     let path = sysfsPath ++ p ++ "/energy_full"
+62c62
+<     let path = sysfsPath ++ p ++ "/charge_now"
+---
+>     let path = sysfsPath ++ p ++ "/energy_now"
+74c74
+<     else showWithColors (printf "%.2f%%") stateInPercentage
+---
+>     else showWithColors (printf "Batt: %.2f%%") stateInPercentage
+{% endhighlight %}
+
+Then as before:
+
+{% highlight bash %}
+runhaskell Setup.lhs configure --user
+runhaskell Setup.lhs build
+runhaskell Setup.lhs install --user
+{% endhighlight %}
+
+Battery information should be visible.