Sound BlasterX AE-5 not working

["Oliver Z." <olze@xxxxxxxxxxxx>]

Since a couple of month i am trying to get that sound card working.
First it seemed to be a pulseaudio problem but now it looks like its an 
alsa/kernel issue.

with some help from #alsa we figured out its the same problem as 
mentioned here: 
https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/issues/935

with everything connected:
> jacks_do
card=0
card=1
numid=51,iface=CARD,name='Line Out CLFE Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off
numid=49,iface=CARD,name='Line Out Front Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off
numid=50,iface=CARD,name='Line Out Surround Phantom Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
numid=48,iface=CARD,name='Line Phantom Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
numid=46,iface=CARD,name='Mic Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
numid=47,iface=CARD,name='Mic Jack',index=1
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
numid=54,iface=CARD,name='SPDIF In Phantom Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
numid=52,iface=CARD,name='SPDIF Phantom Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
numid=53,iface=CARD,name='SPDIF Phantom Jack',index=1
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
card=2
numid=25,iface=CARD,name='HDMI/DP,pcm=10 Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off
numid=31,iface=CARD,name='HDMI/DP,pcm=11 Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off
numid=37,iface=CARD,name='HDMI/DP,pcm=12 Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off
numid=1,iface=CARD,name='HDMI/DP,pcm=3 Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off

line out jack removed
> jacks_do
card=0
card=1
numid=51,iface=CARD,name='Line Out CLFE Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off
numid=49,iface=CARD,name='Line Out Front Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off
numid=50,iface=CARD,name='Line Out Surround Phantom Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
numid=48,iface=CARD,name='Line Phantom Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
numid=46,iface=CARD,name='Mic Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
numid=47,iface=CARD,name='Mic Jack',index=1
  ; type=BOOLEAN,access=r-------,values=1
  : values=off
numid=54,iface=CARD,name='SPDIF In Phantom Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
numid=52,iface=CARD,name='SPDIF Phantom Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
numid=53,iface=CARD,name='SPDIF Phantom Jack',index=1
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
card=2
numid=25,iface=CARD,name='HDMI/DP,pcm=10 Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off
numid=31,iface=CARD,name='HDMI/DP,pcm=11 Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off
numid=37,iface=CARD,name='HDMI/DP,pcm=12 Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off
numid=1,iface=CARD,name='HDMI/DP,pcm=3 Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off

and line out plugged in again
> jacks_do
card=0
card=1
numid=51,iface=CARD,name='Line Out CLFE Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off
numid=49,iface=CARD,name='Line Out Front Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off
numid=50,iface=CARD,name='Line Out Surround Phantom Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
numid=48,iface=CARD,name='Line Phantom Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
numid=46,iface=CARD,name='Mic Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
numid=47,iface=CARD,name='Mic Jack',index=1
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
numid=54,iface=CARD,name='SPDIF In Phantom Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
numid=52,iface=CARD,name='SPDIF Phantom Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
numid=53,iface=CARD,name='SPDIF Phantom Jack',index=1
  ; type=BOOLEAN,access=r-------,values=1
  : values=on
card=2
numid=25,iface=CARD,name='HDMI/DP,pcm=10 Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off
numid=31,iface=CARD,name='HDMI/DP,pcm=11 Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off
numid=37,iface=CARD,name='HDMI/DP,pcm=12 Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off
numid=1,iface=CARD,name='HDMI/DP,pcm=3 Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off

i would love to have this soundcard working.
i had to buy a cheap usb soundcard now to get my headset working on 
linux (fedora 33).
on windows it works as expected