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Help I/O file system writes hang

JayFReaZy

Newbie
I've had my Captivate since about the end of October and things have been running great. However, ever since I upgraded to the official 2.2 Froyo via Kies mini I started to notice that at times my phone has moments where it freezes momentarily for about 5-7 seconds. Even if I hit the power button my phone doesn't "go to sleep" or "wake up". Also, when playing music all of a sudden the music will pause for 5-7 seconds in which my phone is frozen, then all of a sudden will continue to play.

Since I'm not checking my phone 24/7, I'm not sure how often it freezes. Only when I pick up my phone to do something and to see its unresponsiveness is the only way I can find out its happening. If I'd have to guess, I've caught this system stutter or freeze anywhere between 0-3 times a day.

Another strange thing I noticed was when I was running a test on Quadrant. I know these benchmarks are very subjective, but when I was running it the other day I noticed at the "I/O file system writes" it stays at 0/4 for about a minute and a half to two minutes (I've timed it). Is that normal? I don't recall it taking that long on eclair. Or is this the "lag" that people refer to when talking about the galaxy s phones? The only thing I've done to my phone is root it with "one click root" since it was the only app that could root froyo; and the other apps that I'm using that requires root is Titanium backup, and shoot me (screen shot app). Other than that I don't have too many apps installed. I still have 1.14GB out of 2GB on the internal memory which all my apps are stored on. Out of the 13gb on the internal SD I have 5GB left (due mostly to mp3's). I'm really tempted on flashing a custom ROM to see if that might fix the problem, however I still feel that I'm an android n00b and would just brick it. Any-who, any advice, or input on why this maybe happening, or how I can fix it would be greatly appreciated!
 
Me too. You've done a more thorough job diagnosing it than I have. I too noticed this after I upgraded to 2.2 and the symptom continued on a replacement Captivate (with 2.2 pre-installed) which I though was odd.

I notice it mostly when playing podcasts both using the native Media Player and Car Cast. I suspected network traffic, especially WeatherBug but I stopped its updates today and it still hung up.

I sometimes note the sluggishness you observed but hadn't tied the two together.

I'm not rooted and relatively few apps.
 
Mine is the same way. I wish I hadn't upgraded to Froyo. The few advantages it added are outweighed by the new issues it introduced. This phone has enough problems as it is.
 
I've had the same problems since I upgraded to 2.2, although the I/O file writes always took several minutes on my phone, even under 2.1. My phone will freeze for as much as 10 minutes though. That's the longest I've timed.
 
I kinda forgot I created this thread a while back, lol. Good news though, there is a fix for this if you're willing to attempt it. Two weeks ago I was just so fed up with this "lag/freeze" issue I decided I was going to flash a custom ROM. I figured I have insurance on the phone, and this bug was making me want to chuck my phone at the window at times. I finally gathered enough courage to flash this thing after doing a lot of reading. I deciding to go with serendipity 6.3 and guess what, NO MORE HANGS or FREEZES. I ran the quadrant tested and it flew right through the I/O test phase. I'm also pleased to see my phone now getting 1600 on the benchmark.

So there you have it, if you were frustrated like I was I strongly suggest flashing a custom ROM. I've had this ROM for two weeks now and have been enjoying every minute of it. If you're on the wall about flashing a ROM, google "mobile tech video's". He has provided a three part 30 minute video of what exactly you must do. It is extremely detailed and informative. I followed his steps exactly, and the flash was perfect. For anyone experiencing this problem, I strongly suggest to flash, not only to fix this annoying problem, but to tremendously improve your phone.
 
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