HP Spectre 13 with Linux: Wifi/Sound problems solved
, 21 Jun, 2014
After two months of intensive usage of my new Ultrabook my result for it remains positive. Most of the criticism I had disappear slowly, most importantly the bad Wifi situation and the bad sound (compared to Windows).
Problem: Wifi connected but no Internet
The problem with the Wifi connection disappeared almost magically (aka through Kernel updates). It is difficult now to find the solution but I think since Ubuntu’s Kernel version 3.13.0-27 everything transmits fine. Nevertheless I already had a stable connection after simplifying the WPA2 password and changing the Wifi channel to <10. So I cannot reproduce anymore which change was the one bringing luck. Now I use Kernel 3.15.
I think it is worth mentioning that the Bug Report #42978 for this is still open.
Problem: Dull, bass-less sound despite „BeatsAudio®“
The summery of my efforts trying to improve the very good sound quality compatibilities of the Spectre 13 with Linux is:
- ALSA Bug Report #74841 editted (at first assuming that a subwoofer was available)
- HP Support contacted (at this point a special thanks to HP: They treated the problem report seriously, sadly with no success yet…)
- The German blogger cbx comments to my last article, how he changed the problematically configured high pass filter to react on reasonable frequencies.
I tried changing the frequency which indeed resulted in a way better sound quality with somewhat one can call bass. The following line made it possible:
sudo hda-verb /dev/snd/hwC1D0 0x1a 0x795 0x00
You can hear the result immediatly, also while playing music. Actually you have to run the command after every startup but I informed the Kernel hackers about his circumstance so I hope there will be a patch in the upcoming Kernel versions.