User-agent: mu4e 1.6.10; emacs 27.2
From:   Rouven Czerwinski <rouven@czerwinskis.de>
To:     Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>
Cc:     alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
        Simeon Simeonoff <sim.simeonoff@gmail.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
        Colin Ian King <colin.king@intel.com>
Subject: IOMMU Page Fault with Creative Soundblaster Zx after suspend
Date:   Wed, 29 Dec 2021 16:24:13 +0100
Message-ID: <87mtkjqvgj.fsf@czerwinskis.de>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

Hi,

With current 5.15.11, my soundblaster Zx is not correctly coming back
from suspend. Dmesg prints:

[Mi Dez 29 16:12:14 2021] [drm] UVD and UVD ENC initialized successfully.
[Mi Dez 29 16:12:14 2021] snd_hda_codec_ca0132 hdaudioC0D1: ca0132 DSP downloaded and running
[Mi Dez 29 16:12:15 2021] [drm] VCE initialized successfully.
[Mi Dez 29 16:12:15 2021] usb 1-5: reset full-speed USB device number 2 using xhci_hcd
[Mi Dez 29 16:12:16 2021] ata1.00: Enabling discard_zeroes_data
[Mi Dez 29 16:12:16 2021] OOM killer enabled.
[Mi Dez 29 16:12:16 2021] Restarting tasks ... done.
[Mi Dez 29 16:12:16 2021] PM: suspend exit
[Mi Dez 29 16:12:16 2021] snd_hda_intel 0000:06:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x000f address=0xdf880000 flags=0x0000]
[Mi Dez 29 16:12:17 2021] igb 0000:08:00.0 enp8s0: igb: enp8s0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX

Where the IOMMU Page Fault looks suspicious. Unbinding and rebinding the
driver using sysfs fixes it, thats the current workaround I have
been using.

Thanks and happy holidays,
Rouven Czerwinski