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    ALSA: hda - Skip Realtek SKU check for Lenovo machines · 09da111a
    Takashi Iwai 提交于
    Realtek codec driver expects an implicit rule where either the codec
    SSID or the pincfg NID 0x1d contains the some information encoded in
    some bits.  One of the expected information is there is the
    availability of PC beep, and the driver doesn't build up the PC beep
    control if this is *supposed* to be disabled there.
    
    Meanwhile, Lenovo doesn't seem to follow this requirement (yes it's
    non-standard after all), and the BIOS sets just the normal SSID and
    the pincfg values.  This resulted in the lack of PC beep on a few
    machines, purely with a lucky or unlucky number.  It didn't bother
    most people, but some people still demand the PC beep, as found in bug
    reports.
    
    This patch just adds the fixup chain to Lenovo machines to skip the
    SKU checks.  Then the beep control will show up in the mixer, and user
    can still decide to enable / disable it via the standard mixer
    interface.
    
    Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=156311Signed-off-by: NTakashi Iwai <tiwai@suse.de>
    09da111a
patch_realtek.c 213.6 KB