On Tue, May 13, 2014 at 09:28:31AM -0500, Juan Carlos Garcés Mariño wrote: > (dBm) rssi snr nf > > Bad laptop -85 13 -98 > Good laptop -40 53 -91
The RSSI is much lower than usual, the noise floor is a bit lower than usual, as a consequence the signal to noise ratio is too low for reliable operation. There is a major fault in the radio system of this bad laptop. I do not recall what you have tried so far, but my advice is to change the system a component at a time to find out which component is at fault. There are only three components that can be changed; - change the left-hand antenna and coax, - change the right-hand antenna and coax, - change wireless card. Test again after each change. Record the results. Identify the faulty component and replace it. Predictable causes of failure for each component: - antenna physical impact damage, - water in antenna case, - broken coax cable termination inside antenna, - coax cable twist, compression, abrasion or water damage, - coax cable connector physical damage, - wireless card connector physical damage, - wireless card electrostatic discharge damage, - wireless card water damage, - wireless card product lifetime or thermal cycle damage. -- James Cameron http://quozl.linux.org.au/ _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel