I've been impacted by this bug, in that it disables all "Envy24" soundcards such as the popular (but obsolete) M-Audio "Delta" series PCI audio cards. See http://article.gmane.org/gmane.linux.alsa.user/39428 .
Additional side-effects/impacts of this bug are that the applications used to talk to this series of music-production soundcards no longer work. Specifically "my" https://launchpad.net/ubuntu/+source/mudita24 as well as the older 'envy24control' that it replaces. The list of cards this bug disables is long: M-Audio Delta 1010, Delta 1010LT, Delta DiO 2496, Delta 66, Delta 44, Delta 410 and Audiophile 2496. Terratec EWS 88MT, EWS 88D, EWX 24/96, DMX 6Fire, Phase 88. Hoontech Soundtrack DSP 24, Soundtrack DSP 24 Value, Soundtrack DSP 24 Media 7.1. Event Electronics EZ8. Digigram VX442. Lionstracs, Mediastaton. Terrasoniq TS 88. Roland/Edirol DA-2496. The problem persists using the above-suggested "fix" packages of "4.4.0-2.16" which I retrieved from https://launchpad.net/ubuntu/xenial/amd64/linux-image-4.4.0-2-generic/4.4.0-2.16 https://launchpad.net/ubuntu/xenial/amd64/linux-image-extra-4.4.0-2-generic/4.4.0-2.16 https://launchpad.net/ubuntu/xenial/amd64/linux-headers-4.4.0-2/4.4.0-2.16 https://launchpad.net/ubuntu/xenial/amd64/linux-headers-4.4.0-2-generic/4.4.0-2.16 Likewise, the problem persists using the above-suggested "lowlatency" kernels. In all cases, for 4.4.1, 4.4.0-2, or their lowlatency variants, there is a missing "snd_ice1712" module in /lib/modules/4.4.1-040401-generic/kernel/sound/pci/ice1712/ . The directory contains modules for snd_ice1724 which is a completely different soundcard (which nobody uses or has) snd_ice1724 . snd-ice1712.ko is missing. -rw-r--r-- 1 root root 247046 Jan 31 12:48 snd-ice1724.ko -rw-r--r-- 1 root root 9230 Jan 31 12:48 snd-ice17xx-ak4xxx.ko In kernel 4.3.0 (directory /lib/modules/4.3.0-040300-generic/kernel/sound/pci/ice1712/ ) the file is present and all the envy24 cards I have (Terratec DMX6Fire, M-Audio Delta 66, Event EZ8) work fine: -rw-r--r-- 1 root root 120838 Nov 2 07:01 snd-ice1712.ko -rw-r--r-- 1 root root 246270 Nov 2 07:01 snd-ice1724.ko -rw-r--r-- 1 root root 9230 Nov 2 07:01 snd-ice17xx-ak4xxx.ko -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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 Committed Status in linux source package in Xenial: Fix Committed 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1534647/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
