Works for me. Add
hdmi_enable_4kp60=1
to the [pi4] section in /boot/firmware/config.txt. I.e.:
[pi4]
max_framebuffers=2
arm_boost=1
hdmi_enable_4kp60=1
And as Daniel mentioned, use a proper HDMI cable.
ubuntu@rpi-4b-rev1d5-ca8d:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.10
Release: 22.10
Codename: kinetic
ubuntu@rpi-4b-rev1d5-ca8d:~$ uname -a
Linux rpi-4b-rev1d5-ca8d 5.19.0-1004-raspi #10-Ubuntu SMP PREEMPT Mon Oct 17
11:27:21 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux
ubuntu@rpi-4b-rev1d5-ca8d:~$ xrandr
Screen 0: minimum 16 x 16, current 3840 x 2160, maximum 32767 x 32767
XWAYLAND0 connected primary 3840x2160+0+0 (normal left inverted right x axis y
axis) 710mm x 400mm
3840x2160 59.98*+
2048x1536 59.95
1920x1440 59.90
1600x1200 59.87
1440x1080 59.99
1400x1050 59.98
1280x1024 59.89
1280x960 59.94
1152x864 59.96
1024x768 59.92
800x600 59.86
640x480 59.38
320x240 59.52
2560x1600 59.94
1920x1200 59.88
1680x1050 59.95
1440x900 59.89
1280x800 59.81
720x480 59.71
640x400 59.95
320x200 58.96
3200x1800 59.96
2880x1620 59.96
2560x1440 59.96
2048x1152 59.90
1920x1080 59.96
1600x900 59.95
1368x768 59.88
1280x720 59.86
1024x576 59.90
864x486 59.92
720x400 59.55
640x350 59.77
** Changed in: linux-raspi (Ubuntu)
Status: New => Invalid
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-raspi in Ubuntu.
https://bugs.launchpad.net/bugs/2004123
Title:
Unable to display 4K 60hz Ubuntu 22.10 for Raspberry Pi
Status in linux-raspi package in Ubuntu:
Invalid
Bug description:
Ubuntu 22.10 won't display 4K at 60hz on Raspberry Pi 4. Workaround of
editing the config.txt file does not seem to work. Hardware
combination is capable of 4K at 60hz as everything works perfectly
fine with Raspberry PI OS 64-bit.
ProblemType: Bug
DistroRelease: Ubuntu 22.10
Package: xorg 1:7.7+23ubuntu2
ProcVersionSignature: Ubuntu 5.19.0-1004.10-raspi 5.19.7
Uname: Linux 5.19.0-1004-raspi aarch64
ApportVersion: 2.23.1-0ubuntu3
Architecture: arm64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: unknown
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Sun Jan 29 16:35:35 2023
DistUpgraded: Fresh install
DistroCodename: kinetic
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
ImageMediaBuild: 20221018.1
Lspci-vt: -[0000:00]---00.0-[01]----00.0 VIA Technologies, Inc. VL805/806
xHCI USB 3.0 Controller
ProcEnviron:
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: coherent_pool=1M 8250.nr_uarts=0
snd_bcm2835.enable_headphones=0 snd_bcm2835.enable_headphones=1
snd_bcm2835.enable_hdmi=1 snd_bcm2835.enable_hdmi=0
video=HDMI-A-1:3840x2160M@30 smsc95xx.macaddr=E4:5F:01:5E:92:10
vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000 zswap.enabled=1
zswap.zpool=z3fold zswap.compressor=zstd dwc_otg.lpm_enable=0 console=tty1
root=LABEL=writable rootfstype=ext4 rootwait fixrtc quiet splash
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
acpidump:
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.113-2
version.libgl1-mesa-dri: libgl1-mesa-dri 22.2.1-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.4-2ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-3
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:1.0.17-2build1
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