Digital noise when streaming audio via USB-B.

[Joeschmo]

Installed 1.95 a few days ago. Made a small difference, but I must emphasize small. I switched from the USB 3 to USB 2 interface. Still little change. There is change, but only a little. I’m using the QU24 as my system audio interface and the streaming noise occurs in any program that sends audio to the QU. ProTools, YouTube, Windows media etc. doesn’t matter. I’ve set all power management to never or to 100%. For Me it seems only to happen to the playback stream, however I do little in house recording. Most is done live at gigs, then imported and mixed down. Does anyone have any information as to whether switching to TC/IP would eliminate the problem, meaning it only happens with USB, and continue to use MIDI for the control if possible? Just thinking out loud.

[Smokehead]

After some more testing i’ve noticed the same behaviour like Joeschmo. The distortion only occures on the playback stream. The recorded media is not distorted.

[Smokehead]

Now i got this error even when disabling XHCI via BIOS on my MSI…. At least this had worked until v1.95 ..

[Jay-T]

Is there any further information on the state of the problem? The firmware update doesn’t look like it’s fixed the problem, only minimised it. This is an issue for our SQ6. Attached an mp3 of the sounds we are getting when recording via USB-B to a MacBook Pro.

Attachments:

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[Crosan007]

Hooray!

1.95 seems to have completely fixed the issue for me.

I’m running Ubuntu 16.04.4 LTS on an Intel 4790-K, USB3.

I’m mapping the USB sources via GStreamer as described Here and connecting into OBS Studio as described here

[Jay-T]

Great to hear. Any word on a SQ firmware update for those of us suffering the same problem on an SQ mixer?

[Bob2s]

My problem is when connecting my portable LaCie drive to the Qu-Drive usb, I have a digital noise in the LR master, but only on the Left. This is when the LaCie is being read only at first connection.
Qu-16 with V1.95

[Bob2s]

Just found that the noise is from ST3, pull down ST3 fader and the noise in main LR on the Left CH stops

[Alexander]

I didn’t have the problem with Qu-Pac 1.94 – Rev 4557. Then I upgraded to 1.95 – Rev 4561 and the problem started.

Every couple of minutes the weird distortion occurs for a couple of seconds, very repeatable. I used the QU-PAC to record the signal from my speakers while playing a piece.

I tried re-booting the computer, hard-resetting the Qu-Pac, unplugging everything etc. didn’t help. I did a firmware-downgrade to 1.94 – Rev 4557 and now the problem is gone.

I put my information here instead of the Google doc, and I’ll happily answer more questions about my setup or try stuff.

Mixer: Qu-Pac
Computer: Laptop, Debian testing, kernel 4.17.0-3-amd64 #1 SMP Debian 4.17.17-1 (2018-08-18) x86_64 GNU/Linux
Processor: Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz
USB-B is connected to the laptop directly, the only other external USB device is the mouse.
It’s connected to a USB-3.0 port since all 4 ports are USB-3.0
Buffer setting: I start jack like this: jackd -r -dalsa -dhw:2 -r48000 -p1024 -n3 -i32 -o32 (no realtime, 1024 samples buffer size). I also tested 256 as buffer size, no difference.
The noise occurs during playback, I didn’t test what happens if I use a known-sane audio source for recording.
Power Management: I’m not sure. When I leave the laptop alone long enough the screen does turn off but that’s far longer than the couple of minutes before the distortion occurs.
Wifi: There is a built-in Wifi but I wasn’t using it (ifconfig wlp3s0 down)
Other USB devices: The built-in video camera and bluetooth use the internal USB, output of “lsusb -t”:
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/8p, 5000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/16p, 480M
|__ Port 3: Dev 16, If 4, Class=Audio, Driver=snd-usb-audio, 480M
|__ Port 3: Dev 16, If 2, Class=Audio, Driver=snd-usb-audio, 480M
|__ Port 3: Dev 16, If 0, Class=(Defined at Interface level), Driver=, 480M
|__ Port 3: Dev 16, If 5, Class=Audio, Driver=snd-usb-audio, 480M
|__ Port 3: Dev 16, If 3, Class=Audio, Driver=snd-usb-audio, 480M
|__ Port 3: Dev 16, If 1, Class=Audio, Driver=snd-usb-audio, 480M
|__ Port 4: Dev 14, If 1, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 4: Dev 14, If 0, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 7: Dev 3, If 0, Class=Vendor Specific Class, Driver=, 12M
|__ Port 8: Dev 4, If 1, Class=Wireless, Driver=btusb, 12M
|__ Port 8: Dev 4, If 0, Class=Wireless, Driver=btusb, 12M
|__ Port 9: Dev 5, If 0, Class=Video, Driver=uvcvideo, 480M
|__ Port 9: Dev 5, If 1, Class=Video, Driver=uvcvideo, 480M

Here’s the output of “lshw”, showing all the hardware:

description: Notebook
product: P640RE (Not Applicable)
vendor: XMG
version: Not Applicable
serial: Not Applicable
width: 64 bits
capabilities: smbios-3.0.0 dmi-3.0.0 smp vsyscall32
configuration: boot=normal chassis=notebook family=Not Applicable sku=Not Applicable uuid=80FA5B24-5D8F-0000-0000-000000000000
*-core
description: Motherboard
product: P640RE
vendor: XMG
physical id: 0
version: Not Applicable
serial: Not Applicable
slot: Not Applicable
*-firmware
description: BIOS
vendor: American Megatrends Inc.
physical id: 0
version: 1.05.12
date: 01/05/2016
size: 64KiB
capacity: 5MiB
capabilities: pci upgrade shadowing cdboot bootselect socketedrom edd int5printscreen int9keyboard int17printer acpi usb biosbootspecification uefi
*-cache:0
description: L1 cache
physical id: 13
slot: L1 Cache
size: 128KiB
capacity: 128KiB
capabilities: synchronous internal write-back data
configuration: level=1
*-cache:1
description: L1 cache
physical id: 14
slot: L1 Cache
size: 128KiB
capacity: 128KiB
capabilities: synchronous internal write-back instruction
configuration: level=1
*-cache:2
description: L2 cache
physical id: 15
slot: L2 Cache
size: 1MiB
capacity: 1MiB
capabilities: synchronous internal write-back unified
configuration: level=2
*-cache:3
description: L3 cache
physical id: 16
slot: L3 Cache
size: 6MiB
capacity: 6MiB
capabilities: synchronous internal write-back unified
configuration: level=3
*-cpu
description: CPU
product: Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz
vendor: Intel Corp.
physical id: 17
bus info: cpu@0
version: Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz
serial: To Be Filled By O.E.M.
slot: U3E1
size: 3204MHz
capacity: 3500MHz
width: 64 bits
clock: 100MHz
capabilities: lm fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp x86-64 constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp flush_l1d cpufreq
configuration: cores=4 enabledcores=4 threads=8
*-memory
description: System Memory
physical id: 18
slot: System board or motherboard
size: 48GiB
*-bank:0
description: SODIMM DDR4 Synchronous 2133 MHz (0.5 ns)
product: 16ATF2G64HZ-2G1A1
vendor: Micron
physical id: 0
serial: 16209500
slot: ChannelA-DIMM0
size: 16GiB
width: 64 bits
clock: 2133MHz (0.5ns)
*-bank:1
description: SODIMM DDR4 Synchronous 2133 MHz (0.5 ns)
product: KHX2133C13S4/8G
vendor: Kingston
physical id: 1
serial: 10542265
slot: ChannelA-DIMM1
size: 8GiB
width: 64 bits
clock: 2133MHz (0.5ns)
*-bank:2
description: SODIMM DDR4 Synchronous 2133 MHz (0.5 ns)
product: 16ATF2G64HZ-2G1A1
vendor: Micron
physical id: 2
serial: 16209421
slot: ChannelB-DIMM0
size: 16GiB
width: 64 bits
clock: 2133MHz (0.5ns)
*-bank:3
description: SODIMM DDR4 Synchronous 2133 MHz (0.5 ns)
product: KHX2133C13S4/8G
vendor: Kingston
physical id: 3
serial: 10542213
slot: ChannelB-DIMM1
size: 8GiB
width: 64 bits
clock: 2133MHz (0.5ns)
*-pci
description: Host bridge
product: Skylake Host Bridge/DRAM Registers
vendor: Intel Corporation
physical id: 100
bus info: pci@0000:00:00.0
version: 07
width: 32 bits
clock: 33MHz
configuration: driver=skl_uncore
resources: irq:0
*-pci:0
description: PCI bridge
product: Skylake PCIe Controller (x16)
vendor: Intel Corporation
physical id: 1
bus info: pci@0000:00:01.0
version: 07
width: 32 bits
clock: 33MHz
capabilities: pci pm msi pciexpress normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:16 ioport:e000(size=4096) memory:de000000-df0fffff ioport:c0000000(size=301989888)
*-display
description: VGA compatible controller
product: GM204M [GeForce GTX 970M]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
configuration: driver=nvidia latency=0
resources: irq:128 memory:de000000-deffffff memory:c0000000-cfffffff memory:d0000000-d1ffffff ioport:e000(size=128) memory:c0000-dffff
*-multimedia
description: Audio device
product: GM204 High Definition Audio Controller
vendor: NVIDIA Corporation
physical id: 0.1
bus info: pci@0000:01:00.1
version: a1
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:17 memory:df080000-df083fff
*-usb
description: USB controller
product: Sunrise Point-H USB 3.0 xHCI Controller
vendor: Intel Corporation
physical id: 14
bus info: pci@0000:00:14.0
version: 31
width: 64 bits
clock: 33MHz
capabilities: pm msi xhci bus_master cap_list
configuration: driver=xhci_hcd latency=0
resources: irq:124 memory:df310000-df31ffff
*-usbhost:0
product: xHCI Host Controller
vendor: Linux 4.17.0-3-amd64 xhci-hcd
physical id: 0
bus info: usb@1
logical name: usb1
version: 4.17
capabilities: usb-2.00
configuration: driver=hub slots=16 speed=480Mbit/s
*-usb:0
description: Audio device
product: QU-PAC
vendor: Allen&Heath Ltd
physical id: 3
bus info: usb@1:3
version: 0.01
capabilities: usb-2.00 audio-control
configuration: driver=snd-usb-audio maxpower=100mA speed=480Mbit/s
*-usb:1
description: Mouse
product: G400s Optical Gaming Mouse
vendor: Logitech
physical id: 4
bus info: usb@1:4
version: 83.00
capabilities: usb-2.00
configuration: driver=usbhid maxpower=98mA speed=12Mbit/s
*-usb:2 UNCLAIMED
description: Generic USB device
product: EgisTec_ES603
vendor: EgisTec
physical id: 7
bus info: usb@1:7
version: 2.00
capabilities: usb-1.10
configuration: maxpower=100mA speed=12Mbit/s
*-usb:3
description: Bluetooth wireless interface
vendor: Intel Corp.
physical id: 8
bus info: usb@1:8
version: 0.01
capabilities: bluetooth usb-2.00
configuration: driver=btusb maxpower=100mA speed=12Mbit/s
*-usb:4
description: Video
product: BisonCam, NB Pro
vendor: Generic
physical id: 9
bus info: usb@1:9
version: 6.05
serial: 200901010001
capabilities: usb-2.00
configuration: driver=uvcvideo maxpower=500mA speed=480Mbit/s
*-usbhost:1
product: xHCI Host Controller
vendor: Linux 4.17.0-3-amd64 xhci-hcd
physical id: 1
bus info: usb@2
logical name: usb2
version: 4.17
capabilities: usb-3.00
configuration: driver=hub slots=8 speed=5000Mbit/s
*-generic
description: Signal processing controller
product: Sunrise Point-H Thermal subsystem
vendor: Intel Corporation
physical id: 14.2
bus info: pci@0000:00:14.2
version: 31
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=intel_pch_thermal latency=0
resources: irq:18 memory:df32e000-df32efff
*-communication
description: Communication controller
product: Sunrise Point-H CSME HECI #1
vendor: Intel Corporation
physical id: 16
bus info: pci@0000:00:16.0
version: 31
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=mei_me latency=0
resources: irq:125 memory:df32d000-df32dfff
*-sata
description: SATA controller
product: Sunrise Point-H SATA Controller [AHCI mode]
vendor: Intel Corporation
physical id: 17
bus info: pci@0000:00:17.0
logical name: scsi0
logical name: scsi2
version: 31
width: 32 bits
clock: 66MHz
capabilities: sata msi pm ahci_1.0 bus_master cap_list emulated
configuration: driver=ahci latency=0
resources: irq:123 memory:df328000-df329fff memory:df32c000-df32c0ff ioport:f050(size=8) ioport:f040(size=4) ioport:f020(size=32) memory:df32b000-df32b7ff
*-disk:0
description: ATA Disk
product: Samsung SSD 850
physical id: 0
bus info: scsi@0:0.0.0
logical name: /dev/sda
version: 1B6Q
serial: S24BNXAGA04804Z
size: 232GiB (250GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 logicalsectorsize=512 sectorsize=512 signature=b47fe982
*-volume:0
description: Linux filesystem partition
vendor: Linux
physical id: 1
bus info: scsi@0:0.0.0,1
logical name: /dev/sda1
logical name: /boot
version: 1.0
serial: 006707d2-042a-4161-af39-676e7a1ed722
size: 243MiB
capacity: 243MiB
capabilities: primary bootable extended_attributes large_files ext2 initialized
configuration: filesystem=ext2 lastmountpoint=/boot modified=2018-08-31 23:16:12 mount.fstype=ext2 mount.options=rw,relatime,block_validity,barrier,user_xattr,acl mounted=2018-08-29 12:33:26 state=mounted
*-volume:1
description: Extended partition
physical id: 2
bus info: scsi@0:0.0.0,2
logical name: /dev/sda2
size: 232GiB
capacity: 232GiB
capabilities: primary extended partitioned partitioned:extended
*-logicalvolume
description: Linux filesystem partition
physical id: 5
logical name: /dev/sda5
serial: ed739b41-861b-4164-9347-d7fbd3419aba
size: 232GiB
capacity: 232GiB
width: 512 bits
capabilities: encrypted luks initialized
configuration: bits=512 cipher=aes filesystem=luks hash=sha256 mode=xts-plain64 version=1
*-disk:1
description: ATA Disk
product: ST1000LM024 HN-M
physical id: 1
bus info: scsi@2:0.0.0
logical name: /dev/sdb
version: 0001
serial: S2ZWJ9GG907243
size: 931GiB (1TB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 logicalsectorsize=512 sectorsize=4096 signature=94447d30
*-volume:0
description: Windows NTFS volume
physical id: 1
bus info: scsi@2:0.0.0,1
logical name: /dev/sdb1
version: 3.1
serial: a0de-761c
size: 98MiB
capacity: 100MiB
capabilities: primary bootable ntfs initialized
configuration: clustersize=4096 created=2016-01-31 04:02:49 filesystem=ntfs label=System Reserved state=clean
*-volume:1
description: Windows NTFS volume
physical id: 2
bus info: scsi@2:0.0.0,2
logical name: /dev/sdb2
version: 3.1
serial: 066659bb-ff2d-c048-9bfc-caa125a0d717
size: 195GiB
capacity: 195GiB
capabilities: primary ntfs initialized
configuration: clustersize=4096 created=2016-01-31 04:03:11 filesystem=ntfs state=clean
*-volume:2
description: Linux filesystem partition
physical id: 3
bus info: scsi@2:0.0.0,3
logical name: /dev/sdb3
serial: 9fcfa63a-850a-4788-b2d9-9d5f7a7bf8fe
size: 736GiB
capacity: 736GiB
width: 256 bits
capabilities: primary encrypted luks initialized
configuration: bits=256 cipher=aes filesystem=luks hash=sha256 mode=xts-plain64 version=1
*-pci:1
description: PCI bridge
product: Sunrise Point-H PCI Express Root Port #5
vendor: Intel Corporation
physical id: 1c
bus info: pci@0000:00:1c.0
version: f1
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:16 ioport:d000(size=4096) memory:df200000-df2fffff
*-generic
description: Unassigned class
product: RTL8411B PCI Express Card Reader
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list rom
configuration: driver=rtsx_pci latency=0
resources: irq:121 memory:df215000-df215fff memory:df200000-df20ffff
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0.1
bus info: pci@0000:02:00.1
logical name: enp2s0f1
version: 12
serial: 80:fa:5b:24:5d:8f
size: 1Gbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8168 driverversion=8.046.00-NAPI duplex=full ip=10.3.99.104 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
resources: irq:122 ioport:d000(size=256) memory:df214000-df214fff memory:df210000-df213fff
*-pci:2
description: PCI bridge
product: Sunrise Point-H PCI Express Root Port #6
vendor: Intel Corporation
physical id: 1c.5
bus info: pci@0000:00:1c.5
version: f1
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:17 memory:df100000-df1fffff
*-network DISABLED
description: Wireless interface
product: Wireless 3165
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlp3s0
version: 81
serial: e0:94:67:68:db:52
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=4.17.0-3-amd64 firmware=29.1044073957.0 latency=0 link=no multicast=yes wireless=IEEE 802.11
resources: irq:127 memory:df100000-df101fff
*-isa
description: ISA bridge
product: Sunrise Point-H LPC Controller
vendor: Intel Corporation
physical id: 1f
bus info: pci@0000:00:1f.0
version: 31
width: 32 bits
clock: 33MHz
capabilities: isa bus_master
configuration: latency=0
*-memory UNCLAIMED
description: Memory controller
product: Sunrise Point-H PMC
vendor: Intel Corporation
physical id: 1f.2
bus info: pci@0000:00:1f.2
version: 31
width: 32 bits
clock: 33MHz (30.3ns)
capabilities: bus_master
configuration: latency=0
resources: memory:df324000-df327fff
*-multimedia
description: Audio device
product: Sunrise Point-H HD Audio
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 31
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=snd_hda_intel latency=32
resources: irq:126 memory:df320000-df323fff memory:df300000-df30ffff
*-serial
description: SMBus
product: Sunrise Point-H SMBus
vendor: Intel Corporation
physical id: 1f.4
bus info: pci@0000:00:1f.4
version: 31
width: 64 bits
clock: 33MHz
configuration: driver=i801_smbus latency=0
resources: irq:16 memory:df32a000-df32a0ff ioport:f000(size=32)
*-pnp00:00
product: PnP device PNP0c02
physical id: 1
capabilities: pnp
configuration: driver=system
*-pnp00:01
product: PnP device PNP0c02
physical id: 2
capabilities: pnp
configuration: driver=system
*-pnp00:02
product: PnP device PNP0b00
physical id: 3
capabilities: pnp
configuration: driver=rtc_cmos
*-pnp00:03
product: PnP device INT3f0d
physical id: 4
capabilities: pnp
configuration: driver=system
*-pnp00:04
product: PnP device PNP0303
physical id: 5
capabilities: pnp
configuration: driver=i8042 kbd
*-pnp00:05
product: PnP device SYN1219
physical id: 6
capabilities: pnp
configuration: driver=i8042 aux
*-pnp00:06
product: PnP device PNP0c02
physical id: 7
capabilities: pnp
configuration: driver=system
*-pnp00:07
product: PnP device PNP0c02
physical id: 8
capabilities: pnp
configuration: driver=system
*-pnp00:08
product: PnP device PNP0c02
physical id: 9
capabilities: pnp
configuration: driver=system
*-pnp00:09
product: PnP device PNP0c02
physical id: a
capabilities: pnp
configuration: driver=system

Attachments:

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[Alexander]

Update: The problem also occurs with firmware 1.94 – Rev 4557 but it’s _very_ rare and unpredictable (~once a day)

[whatsoup]

I haven’t fully tested it yet but it seems I have eliminated the problem by buying a USB2 hub and dumping lots of devices onto that instead. All that goes into my motherboard now is mouse, keyboard, SQ and HUB. I used to get the problem every time I moved my mouse!

What’s weird is, I thought I’d tried removing all ‘unwanted’ devices as part of my original troubleshooting process with no success. Maybe it is now something to do with me spreading devices across different USB controllers.

Something worth trying if you haven’t already, even if it is stating the obvious, remove all unwanted devices for now, but spread them across ports far away from each other and try different combinations

[Bob]

I’m experiencing the identical problem as junior with my SQ5. The recorded audio is distorted and garbled using both Reaper and Tracktion software.

I’m also using a MacBook. Adjusting the buffer size does not make any difference with either software.

I’ll update to firmware version 1.3.0 later today and see if there is any improvement.

[Bob]

Here’s a sample of the unprocessed audio. The first set recorded just fine. The second and third sets were distorted and garbled.

No changes were made … I simply paused the recording during the break between sets.

Attachments:

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[Fabrizio Roncato]

So guys, tonight I recordered a whole live without distortion with my SQ5, using Tracks Live, my laptop is a T410 with a 120GB SSD, I’ve mapped in the I/O “Outputs/Mix Out/MAIN L-> channel 1, MAIL R-> channel 2” of the USB B source.

2 hours and perfect recording.

[Frank]

Yeah, I always told… Never problems with an Lenovo Thinkpad T410. This machine only has USB 2.0 ports… so no problems… I use it since one year and never had a problem since this time. I bought it used from eBay, pimped it up with SSD and a clean Win 7 installation, just for this purpose, beacause the brandnew expensive Lenovo Ideapad with 16 GB Ram, SSD also and i5 core, especially bought for this purpose before, alwas had this problem (only USB 3 ports!). I hope, my good old T410 will live as long as my A&H QU16. I fear, A&H will not get a better solution, beacause already they are working so long time on it now and couldn’t fix it for everybody… :-(. But hope dies last 🙂

[Author]

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