ubuntustudio-bugs team mailing list archive

[Niels Mayer <1534647@xxxxxxxxxxxxxxxxxx>]

Tim -- I downloaded this latest build (*) and can confirm working ICE1712 cards, and associated mudita24(1) application, on
4.4.0-6-generic #21-Ubuntu SMP Tue Feb 16 20:32:27 UTC

Audio:
card 0: DMX6Fire [TerraTec DMX6Fire], device 0: ICE1712 multi [ICE1712 multi]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: DMX6Fire [TerraTec DMX6Fire], device 0: ICE1712 multi [ICE1712 multi]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
Midi:
 16:0    TerraTec DMX6Fire                MIDI-Front DMX6fire 0
 16:32   TerraTec DMX6Fire               Wavetable DMX6fire 0

Thanks!!

(*): 
https://launchpad.net/ubuntu/xenial/amd64/linux-headers-4.4.0-6/4.4.0-6.21
https://launchpad.net/ubuntu/xenial/amd64/linux-headers-4.4.0-6-generic/4.4.0-6.21
https://launchpad.net/ubuntu/xenial/amd64/linux-image-4.4.0-6-generic/4.4.0-6.21
https://launchpad.net/ubuntu/xenial/amd64/linux-image-extra-4.4.0-6-generic/4.4.0-6.21

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https://bugs.launchpad.net/bugs/1534647

Title:
  Collateral damage due to kernel configuration change enabling
  CONFIG_ZONE_DEVICE (Kernel 4.4 amd64)

Status in linux package in Ubuntu:
  Fix Released
Status in mudita24 package in Ubuntu:
  Confirmed
Status in linux source package in Xenial:
  Fix Released
Status in mudita24 source package in Xenial:
  Confirmed

Bug description:
  Late in the kernel 4.4 RC (Release Candidate) cycle (between rc7 and
  rc8), Ubuntu implemented an amd64 kernel configuration change enabling
  CONFIG_ZONE_DEVICE.

  The related email: https://lists.ubuntu.com/archives/kernel-
  team/2016-January/067683.html

  The commit message does mention collateral damage: "In effect, this precludes devices that can only DMA from memory addresses below 16MB".
  Indeed we already have a complaint about a sound card that doesn't work as of kernel 4.4-rc8.

  If CONFIG_ZONE_DEVICE is enabled, then CONFIG_ZONE_DMA is forced to disabled, which in turn forces these devices, all are sound cards, and their derivative devices, to be disabled:
  Avance Logic ALS300/ALS300+
  ALi M5451 PCI Audio Controller
  Aztech AZF3328 / PCI168
  Emu10k1 (SB Live!, Audigy, E-mu APS)
  Emu10k1X (Dell OEM Version)
  ESS ES1938/1946/1969 (Solo-1)
  ESS ES1968/1978 (Maestro-1/2/2E)
  ICEnsemble ICE1712 (Envy24)
  ESS Allegro/Maestro3
  S3 SonicVibes
  Trident 4D-Wave DX/NX; SiS 7018.

  References: linux/mm/Kconfig; linux/sound/pci/Kconfig

  One test done (suggested by apw on IRC) was to remove the dependency of ZONE_DEVICE on !ZONE_DMA, but that causes:
  "#error ZONES_SHIFT -- too many zones configured adjust calculation", as apw predicted.
  In a mindless way, I tried to allow more zones in linux/include/linux/page-flags-layout.h, but that caused a bunch of "shifting by too many bits type errors. Anyway it seems that MAX_NR_ZONES is, at least partially, hard coded to 4 in some array definitions and such.

  Please do not ask me to do "apport-collect" for this bug report as it
  is not needed, nor relevant.

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