From: Launchpad Bug Tracker <1900122@bugs.launchpad.net>
To: qemu-devel@nongnu.org
Subject: [Bug 1900122] Re: Unsupported ioctl: cmd=0xffffffff80685600 when accessing /dev/video* in aarch64 guest
Date: Fri, 09 Jul 2021 04:17:24 -0000 [thread overview]
Message-ID: <162580424435.19936.8484432948344079518.malone@loganberry.canonical.com> (raw)
In-Reply-To: 160284373799.25039.16464171690101536645.malonedeb@soybean.canonical.com
[Expired for QEMU because there has been no activity for 60 days.]
** Changed in: qemu
Status: Incomplete => Expired
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1900122
Title:
Unsupported ioctl: cmd=0xffffffff80685600 when accessing /dev/video*
in aarch64 guest
Status in QEMU:
Expired
Bug description:
**Description:**
Any attempt to work with video in aarch64 architecture emulated on x86_64 leads currently to the error "Function not implemented". For example:
```
# v4l2-ctl -l --verbose
Failed to open /dev/video0: Function not implemented
root@12dd9b6fcfcb:/# ll /dev/video*
crw-rw---- 1 root video 81, 0 Oct 16 09:23 /dev/video0
crw-rw---- 1 root video 81, 1 Oct 16 09:23 /dev/video1
```
**Steps to reproduce the issue:**
I have a following setup:
Host Hardware: x86_64 equipped with a webcam (tried different webcams)
Host OS: Ubuntu 20.04.1
Guest Architecture: aarch64
Guest OS: Ubuntu 20.04 (also tried 16.x and 18.x)
Emulation: quemu-user-static (also tried binfmt)
Guest OS is running via Docker + QEMU
```
➜ cat /proc/sys/fs/binfmt_misc/qemu-aarch64
enabled
interpreter /usr/bin/qemu-aarch64-static
flags: F
offset 0
magic 7f454c460201010000000000000000000200b700
mask ffffffffffffff00fffffffffffffffffeffffff
```
**Results received:**
see desrciption.
**Environment:**
* QEMU version: (if you can know it):
ipxe-qemu-256k-compat-efi-roms/focal,now 1.0.0+git-20150424.a25a16d-0ubuntu4 all [installed,automatic]
ipxe-qemu/focal-updates,now 1.0.0+git-20190109.133f4c4-0ubuntu3.2 all [installed,automatic]
qemu-block-extra/focal-updates,now 1:4.2-3ubuntu6.7 amd64 [installed,automatic]
qemu-kvm/focal-updates,now 1:4.2-3ubuntu6.7 amd64 [installed]
qemu-system-common/focal-updates,now 1:4.2-3ubuntu6.7 amd64 [installed,automatic]
qemu-system-data/focal-updates,now 1:4.2-3ubuntu6.7 all [installed,automatic]
qemu-system-gui/focal-updates,now 1:4.2-3ubuntu6.7 amd64 [installed,automatic]
qemu-system-x86/focal-updates,now 1:4.2-3ubuntu6.7 amd64 [installed,automatic]
qemu-user-binfmt/focal-updates,now 1:4.2-3ubuntu6.7 amd64 [installed,automatic]
qemu-user/focal-updates,now 1:4.2-3ubuntu6.7 amd64 [installed]
qemu-utils/focal-updates,now 1:4.2-3ubuntu6.7 amd64 [installed,automatic]
qemu/focal-updates,now 1:4.2-3ubuntu6.7 amd64 [installed]
* Container application: Docker
**Output of `docker version`, `podman version` or `singularity
version`**
```
➜ docker version
Client: Docker Engine - Community
Version: 20.10.0-beta1
API version: 1.40
Go version: go1.13.15
Git commit: ac365d7
Built: Tue Oct 13 18:15:22 2020
OS/Arch: linux/amd64
Context: default
Experimental: true
Server: Docker Engine - Community
Engine:
Version: 19.03.13
API version: 1.40 (minimum version 1.12)
Go version: go1.13.15
Git commit: 4484c46d9d
Built: Wed Sep 16 17:01:20 2020
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.4.1
GitCommit: c623d1b36f09f8ef6536a057bd658b3aa8632828
runc:
Version: 1.0.0-rc92
GitCommit: ff819c7e9184c13b7c2607fe6c30ae19403a7aff
docker-init:
Version: 0.18.0
GitCommit: fec3683
```
Guest aarch64 runs in privileged mode:
`docker run --privileged --device=/dev/video0:/dev/video0 --env
DISPLAY=unix$DISPLAY -v $XAUTH:/root/.Xauthority -v
/tmp/.X11-unix:/tmp/.X11-unix -it --rm arm64v8/ubuntu:20.04 bash`
**Additional information:**
I tried also binfmt way to register emulators. The output of `v4l-ctl` was a little bit different:
```
# v4l2-ctl -l
Unsupported ioctl: cmd=0xffffffff80685600
Failed to open /dev/video0: Function not implemented
```
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1900122/+subscriptions
prev parent reply other threads:[~2021-07-09 4:34 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-16 10:22 [Bug 1900122] [NEW] Unsupported ioctl: cmd=0xffffffff80685600 when accessing /dev/video* in aarch64 guest vak
2020-10-16 16:29 ` [Bug 1900122] " vak
2021-04-25 18:40 ` Peter Maydell
2021-04-26 12:39 ` Laurent Vivier
2021-05-09 14:31 ` Thomas Huth
2021-07-09 4:17 ` Launchpad Bug Tracker [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=162580424435.19936.8484432948344079518.malone@loganberry.canonical.com \
--to=1900122@bugs.launchpad.net \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.