Thanks MC for your support!
with PCIe I mean the ExpressCard.
to clarify: the issue was
- HDSP with PCMCIA card not working: the Card is detected, but sampleposition is not advancing in applications using the HDSP driver with a channel sitting on the PCMCIA card HDSP. (hitting "play" in cubase, maschine etc. does not move the playcursor, or does not indicate any signal in the DAW channels, very weird)
- Using only channels of the ExpressCard HDSP works flawlessly.
- Using both PCMCIA and ExpressCard on the same machine, using channels on both HDSPs, with both HDSPs locksynced via ADAT results in harsh noise.
I had no clue what was going on.
I disconnected both HDSPs (unplugged PCMCIA and ExpressCard and hooked up a Motu 828x via USB2.
Gues what: same issue, same symptoms!!!
( the motu works well on a MacBook Pro late 2013)
I tried several hours yesterday to narrow down what the issue is, and I got it:
I am using a powered ExSys 7-port USB2 hub, connected to one USB2 port on my Dell M6500. (all my MIDI Controllers go to this hub, as do dongles, logitech unifying receiver etc...)
On the other of the two USB2 ports there only was a wacom tablet wireless receiver, I plugged this out and connected the Motu to it.
another powered ExSys 7-port USB3 hub is connected to one of the M6500s USB3 ports (with two Displaylink-Adaptors and a 2TB USB3 drive)
the second USB3 port is unused, used to connect various different devices on demand.
Now, I noticed, when I boot the M6500 WITHOUT the USB2-Hub on the first USB2 port, the Motu works flawlessly.
When I boot the Dell M6500 with the USB2-Hub connected, I get the symtoms described above: no signals, no sampleposition advancing.
I have not tried to use the PCMCIA HDSP without the USB2-Hub connected.
Now this is way over my head, can it be that I had a shortcircuit on USB2-port I usually have my USB2 hub connected? Might a defect USB2 controller be the root cause for the PCMCIA card issues? (the expresscard works though)
I had some bluescreens yesterday while trying to find the cause, something with win32k.sys. Is it possible that the complete motherboard of the M6500 is defect? (If nothing is connected to the malfunctioning usb2 port, everything is working fine, despite the bluescreens yesterday)