Monthly Archives: September 2009

Fixing choppy screen on Ubuntu Jaunty

According to a site I googled, XWindow in Ubuntu Jaunty 9.04 has some issue in accessing videocard’s memory region.  My video card is NVidia GeForce 8500  GT with native driver from Nvidia.  Kernel is 2.6.30.5 (compiled from source). I fix … Continue reading

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Unfolding a code with Full optimized flags turned on with GCC

Original code: #include <stdio.h>#include <math.h> double a, b; #define SQR(a)  ((a)*(a)) int main(){    double sum;     a = 0.5;    b = 0.5;    sum = sqrt(SQR(sin(a)) + SQR(cos(b)));     printf(“sum = %f\n”, sum);    return 0;} CFLAGS is set to “-mtune=nocona -mfpmath=sse … Continue reading

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Reasons Why Android Phones will win the war

Apple’s iPhone is definitely now the winner in the criteria of slickness or coolness.  But one of its biggest downsides is it is tied to single provider (AT&T  in US) which charges too much ($30 for its data plan in … Continue reading

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Ooma slows down data traffic

It’s been a month since I bought the Ooma VOIP system. It’s been working fine, except with some issues, like the scout hang (need reset it). My configuration is to put Ooma hub right after DSL modem, so my wireless … Continue reading

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How much power does a Macbook draw?

To find out how much power an Apple’s Macbook laptop withdraws power, I use EZ Kill-A-Watt power meter (got it from Costco for about $28). Select “Watt” mode and connect Macbook power cord to this device. When the laptop is … Continue reading

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Linux VisualĀ Improvements

XFree86 Font Deuglification:http://www.tutorialized.com/view/tutorial/XFree86-Font-Deuglification-Mini-HOWTO/4558 X Window System Application Performance Tuning: http://www.rahul.net/kenton/perf.html

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