Archive for March, 2007

Linux, power management and laptop battery life

Sunday, March 11, 2007

Ever since I’ve got new laptop last November, I was quite unhappy with its battery life. Initially it used to keep computer running for around 2.5 hours with usual workload (mail/www/docs), while Dell advertised up to 5 hours of work with that particular 6-cell battery model. After some time battery lost ~40% of its original capacity without any particular reason, and could hardly manage to get 1.5 hours of work away from AC adapter. Fortunately, Dell’s technical support arranged battery replacement. But new battery’s performance wasn’t much better (2-2.5 hours), so I’ve managed to get… another replacement. :) This time I’ve decided to investigate in details what is actually standing behind laptop’s battery life. (more…)

Resuming from hibernation and Intel 945 video adapter

Monday, March 5, 2007

Intel 945-series video adapter (as probably all Intel’s built-in video adapters) has pretty common issue regarding incorrect resolution modes. Fortunately, that can be easily fixed by 915resolution package. However, that fix needs to be executed not only when computer boots up, but also while resuming from hibernation. Otherwise, we might get some ugly resolution like 1024×768 after resuming, forcing us to execute 915resolution and restart X manually, which makes whole hibernation completely pointless. (more…)