From f0eb83eb8234add5a4248a6084ebd57953b29c2d Mon Sep 17 00:00:00 2001
From: Paul Fertser <fercerpav@gmail.com>
Date: Tue, 11 Feb 2020 09:37:58 +0300
Subject: Battery: fix time calculations on some Linux systems
The calculations are based on the assumption that current_now (or
power_now) are always positive. However, power_supply documentation in
the kernel sources say nothing about it, and so some drivers provide a
signed value (e.g. bq27xxx_battery_current).
Discovered and fixed on ac100/paz00 netbook.
---
src/Xmobar/Plugins/Monitors/Batt.hs | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'src/Xmobar/Plugins')
diff --git a/src/Xmobar/Plugins/Monitors/Batt.hs b/src/Xmobar/Plugins/Monitors/Batt.hs
index 4ea7591..af932ae 100644
--- a/src/Xmobar/Plugins/Monitors/Batt.hs
+++ b/src/Xmobar/Plugins/Monitors/Batt.hs
@@ -227,7 +227,7 @@ readBattery sc files =
a' = max a b -- sometimes the reported max charge is lower than
return $ Battery (3600 * a' / sc') -- wattseconds
(3600 * b / sc') -- wattseconds
- (d / sc') -- watts
+ (abs d / sc') -- watts
s -- string: Discharging/Charging/Full
where grab f = handle onError $ withFile f ReadMode (fmap read . hGetLine)
onError = const (return (-1)) :: SomeException -> IO Float
--
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