After installing linux-modules-extra-raspi all required modules are present and
PWM works as expected
Thank you for help!
The issue can be closed
** Changed in: linux-raspi (Ubuntu)
Status: Confirmed => Invalid
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https://bugs.launchpad.net/bugs/1949276
Title:
linux-image-raspi PWM not available
Status in linux-raspi package in Ubuntu:
Invalid
Bug description:
Hello,
I'm using Raspberry Pi 4b with Ubuntu 21.10.
Seems like all 5.13 kernels don't have PWM support.
Steps to reproduce:
- Enable PWM in config.txt:
`dtoverlay=pwm-2chan,pin=12,func=4,pin2=13,func2=4`
- Check /sys/class/pwm
Expected result:
PWM exists
lrwxrwxrwx 1 root root 0 окт 31 00:49 pwmchip0 ->
../../devices/platform/soc/fe20c000.pwm/pwm/pwmchip0
- What I currently get:
root@raspberrypi:~# ls -l /sys/class/pwm/
total 0
root@raspberrypi:~#
---
With 5.11.0-1021-raspi everything works as expected:
root@raspberrypi:~# uname -a
Linux raspberrypi 5.11.0-1021-raspi #22-Ubuntu SMP PREEMPT Wed Oct 6 17:30:38
UTC 2021 aarch64 aarch64 aarch64 GNU/Linux
root@raspberrypi:~# ls -l /sys/class/pwm/
total 0
lrwxrwxrwx 1 root root 0 окт 31 00:49 pwmchip0 ->
../../devices/platform/soc/fe20c000.pwm/pwm/pwmchip0
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu71
Architecture: arm64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/controlC2',
'/dev/snd/pcmC2D0p', '/dev/snd/controlC1', '/dev/snd/pcmC1D0p',
'/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/pcmC0D0p', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CasperMD5CheckResult: unknown
DistroRelease: Ubuntu 21.10
ImageMediaBuild: 20210421.1
Lspci-vt: -[0000:00]---00.0-[01]----00.0 VIA Technologies, Inc. VL805/806
xHCI USB 3.0 Controller
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 24ae:2010 Shenzhen Rapoo Technology Co., Ltd. Rapoo
2.4G Wireless Device
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Package: linux (not installed)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
LANG=ru_UA.UTF-8
SHELL=/bin/bash
ProcFB: 0 vc4drmfb
ProcKernelCmdLine: coherent_pool=1M 8250.nr_uarts=0
snd_bcm2835.enable_compat_alsa=0 snd_bcm2835.enable_hdmi=1
video=HDMI-A-1:1920x1080M@60 smsc95xx.macaddr=DC:A6:32:61:DD:84
vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000 dwc_otg.lpm_enable=0
root=/dev/mmcblk0p2 rootwait rootfstype=ext4 fixrtc pty.legacy_count=6
zswap.enabled=1 net.ifnames=0
ProcVersionSignature: Ubuntu 5.13.0-1010.11-raspi 5.13.18
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-5.13.0-1010-raspi N/A
linux-backports-modules-5.13.0-1010-raspi N/A
linux-firmware 1.201.1
StagingDrivers: bcm2835_mmal_vchiq bcm2835_v4l2 vc_sm_cma bcm2835_codec
bcm2835_isp snd_bcm2835
Tags: arm64-image raspi-image impish staging
Uname: Linux 5.13.0-1010-raspi aarch64
UpgradeStatus: Upgraded to impish on 2021-08-31 (60 days ago)
UserGroups: N/A
_MarkForUpload: True
acpidump:
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