"Your system seems to be having difficulties".

The bars still look green.

Wdf01000.sys, 640 µs
ACPI.sys, 1251 µs
Hard pagefault count: 754

When being in Playback mode in Sequoia, or in "Standard" recording mode (that means: with Playback engine running) I can monitor the Sequoia status bar. Even while playing an empty project (64 tracks) sometimes the "DSP Max" value suddenly jumps over 100%, and in that instant a lost ASIO buffer occurs.

Using MADIface USB and 1024 buffersize seems to be the safest option.
MADIface XT (via USB) still produces (only a few) lost buffers with the same settings.

I have the impression the hardware is not perfectly suitable. Do you have any recommendations for the choice of a laptop?

Thanks for caring,
Ulrich

Oh dear...

Should we try to connect the MADIface XT via thunderbolt? What kind of hardware adapters to we need?

Hi Ulrich

Sorry to hear of your P1 troubles.  I was planning on replacing my venerable T430 with one soon.  Is the P1 running with the Nvidia card?  Do you have the option in UEFI to disable the Nvidia and use only the built-in Intel graphics?  As a fellow XT/Sequoia user I would try that if it's available.

With regard to getting the XT connected through TB, this below may work.  Note, I use the XT with Matrox external PCIe adapters very successfully, but directly into PCIe, not with Thunderbolt.

1. https://www.sonnettech.com/product/echo … rbolt.html
2. https://www.bhphotovideo.com/c/product/ … d_for.html
3. https://www.bhphotovideo.com/c/product/ … _MXO2.html  OR  https://www.bhphotovideo.com/c/product/ … _MXO2.html

Failing all that, you could look for a workstation notebook with an expresscard slot (probably an HP Zbook or Lenovo P51), and omit #1 from above.

Simon

with regard to ACPI.sys, see also:
https://www.sweetwater.com/sweetcare/ar … cy-issues/

It would be worth posting about this in detail and explaining the issue/needs on the official Lenovo forums. I have seen staff respond there, they may fix it in a bios update.

T430 with an i7 still works very well as a bit acquisition bucket, but it is getting pretty creaky.  It’s frustrating we are still grappling with these issues (if not more so) in 2020.

A bit more on this as I think it's an important issue for a lot of typical RME users.

Notebook Check reviews often include LatencyMon results, but not always and sometimes they are only run for 10 seconds or so.  As we know 5~10 minutes is a meaningful test, I've written to the editors to request they test LM consistently.

Some laptops that show up as having favorable DPC results include HP Zbooks in general (look for models without the U designation - U means a mobile CPU). 

Also the Asus Zenbook Flip 14 UX463FA   https://www.notebookcheck.net/Asus-ZenB … 996.0.html

Really is tough times for notebooks though.  Really sad about the P1.

Are you sure your usb3 chipset is supported by the madiface xt? There is a compatibility list somewhere in the manual.
Georg

For what it's worth i have a Lenovo X1 Extreme (Gen1) which is more or less the same as a P1 with a GTX instead of a Quadro - and i've had a lot of DPC issues as well (with a FireFace 400 UC).

It is my understanding, that Lenovo took a short-cut, and instead of implementing a MUX to switch graphics cards, they are copying data from GPU to GPU instead. The internal display (4k in my case) is hardwired to the Intel GPU and the HDMI port is hardwired to the NVidia GPU. So - this means a lot of additional PCIe traffic depending on your setup.

I've managed to get my laptop fairly stable through a lot of low-level tweaking, but i can't really point to any single fix that will do the trick - except running on the Intel GPU (without external displays) results in much more stable ASIO performance for me. At one point i had my mouse in one of the thunderbolt ports using a USB-C > USB 3 dongle, and this caused alot of low-level spiking - which went away as soon as i used the USB-A ports on the right side. This kind of BS really shouldn't be happening in 2020 ..

Dredging this one up because it's still a problem for live recordists.  I finally gave up on a Zbook 15 G5 for recording.  There was no way for it to be low DPC / LAB free, and there is no technical rock I didn't look under.  For the record, the LAB's did result in audio corruption, they were not just a metric.

I found here a shop with a lot of ex-lease computers and some mint Lenovo W530's.  I bought one and based on my tests will buy another.  Repasted the CPU, turned off the Nvidia, and installed Windows 8.1 - yes!  I can live with the UX knowing the OS is doing very little behind my back.  Sequoia 15.

I even set the CPU in Power Management to 80% to cut down on fan/heat.  Now running at 2.0 GHZ. 

Can record 64 tracks at 48K at 128 buffer all day long without issue.  Ridiculous.

If anyone has any success with MADI on a laptop designed in the last 10 years do let us know.

I just purchased a P1 Gen 3. It has two TB3 ports. In another post I mentioned wanting to use a Sonnet Echo Express SE1 TB 3 PCIe >TB external chassis with my MADI FX PCIe card. This laptop also shares Nvidia and Intel graphics However, I’m wondering if this issue presents itself when using  MADI FX PCIe card with a Sonnet Echo Express SE1 interfacing the TB3 port instead of the USB port on the P1 Gen 3.