I updated my K43U's BIOS 2 days ago to version 2.20 from previous version 2.17. Then I noticed something. I'm not sure this is related to me updating the BIOS but for sure, I noticed this issue after updating the BIOS.
Sometime the speaker will not function. Result of mixerctl will show that the speaker is not muted and if I attach a headphone, mixerctl will update accordingly - headphone works and detaching the headphone will result in still no sound coming out from the speaker. Rebooting will result in the same issue unless I opt for shutting down, then boot the machine. In Win7 the speaker is working fine with no issue so this might not be a BIOS update issue.
I also notice that this machine's Multicard Reader will sometime be detected and sometime not. If you refer to my dmesg, there no card reader detected but sometime I can see this dmesg result added:
umass0 at uhub0 port 5 configuration 1 interface 0 "Generic USB2.0-CRW" rev 2.00/38.82 addr 3
umass0: using SCSI over Bulk-Only
scsibus1 at umass0: 2 targets, initiator 0
sd1 at scsibus1 targ 1 lun 0:
To make it ever more weirder, when Multi-Card is detected, the speaker will have no problem. Eh. But then I never tested the Card Reader in either OpenBSD or Win7 so I don't know if it's faulty or what. My machine have 2 years warranty so I better make sure.
UPDATE 14/03/12: I found that my Realtek MultiCard Reader is not working. Even in Win7. So I better send the machine to Asus Service Center ASAP.
Later.
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