Hi,
I have an HP tx2z
with ALC268 on AMD64 platform. I got it late January of this year.
Promptly, I installed ubuntustudio64 on it. According some threads in
ubuntuforums.org, I have setup this computer to a very satisfactory
status. Starting about 2 weeks after I have ubuntustudio64 installed,
sound started to develop a problem:
1. The front
speakers would all of a sudden mute itself when the volume is high during
the playing of music or video, even though the sound was fine before they mute
themselves.
2. The only way to
bring the sound back is to issue a beep of pc speaker, after I lower the sound
level.
3. Headphone jack
has no output - I have no sound output to headphones. Auto-sensing also
failed.
4. All these
symptoms happened so suddenly after about 2 weeks time when sound was playing
properly to front speakers or headphone with
auto-sensing.
5. I was hoping a
hardware defect (as it then can be fixed or whole unit replaced), but after I
contacted HP support and they sent me a set of recovery DVDs of
Vista.
6. I bought a second
2.5" SATA harddrive to install Vista on, and to my very shocking, the sound
output of front speakers and headphone are working properly under
Vista!!!
7. I put back the
original harddisk and reinstalled ubuntu 8.10, either 32bit or 64bit, but the
sound problem described above is still there.
I have always put
options snd-indel-hda model=toshiba into /etc/modprobe.d/alsa-base, and
all other users of ubuntu have reported this options working fine for
tx2z.
8. I then installed
Alsa 1.0.19 and tried all model options of ALC268 documented in
HD-Audio-Models.txt file, but the problem is still there.
I guess the puzzling
part is 1). it used to work; 2). other tx2z work; 3), speakers work under
Vista; 4). BUT, it is not working.
Has anyone else
experienced such behavior? Is there a solution?
Thanks,
Vincent
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