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Lines 668-683
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| 668 |
A few Hardware/OEM vendors tend to screw up BIOS settings, thus |
668 |
A few Hardware/OEM vendors tend to screw up BIOS settings, thus |
| 669 |
rendering the |
669 |
rendering the |
| 670 |
.Nm |
670 |
.Nm |
| 671 |
driver useless, which usually results in a state where the |
671 |
driver useless. |
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672 |
This usually results in a state where the |
| 672 |
.Nm |
673 |
.Nm |
| 673 |
driver seems to attach and work, but without any sound. Some of |
674 |
driver seems to attach and work, but no sound is played. |
| 674 |
that cases can be solved by tuning loader.conf variables. But before |
675 |
Some cases can be solved by tuning |
| 675 |
trying to fix problem that way, make sure that problem is really exists |
676 |
.Pa loader.conf |
| 676 |
and the PCM audio device you are using really corresponds to expected |
677 |
variables. |
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678 |
Before trying to fix problem that way, make sure that there really is a problem |
| 679 |
and that the PCM audio device in use really corresponds to the expected |
| 677 |
audio connector. |
680 |
audio connector. |
| 678 |
.Pp |
681 |
.Pp |
| 679 |
Some vendors use non-standardized General Purpose I/O (GPIO) pins of codec |
682 |
Some vendors use non-standardized General Purpose I/O (GPIO) pins of the codec |
| 680 |
to control external amplifiers. In some cases setting proper combination of |
683 |
to control external amplifiers. |
| 681 |
GPIO bits may be needed to make sound work on specific device. |
684 |
In some cases setting a combination of GPIO bits may be needed to make |
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685 |
sound work on a specific device. |
| 682 |
.Pp |
686 |
.Pp |
| 683 |
HDMI and DisplayPort audio may also require support from video driver. |
687 |
HDMI and DisplayPort audio may also require support from video driver. |