Public bug reported:
On a hybrid-graphics laptop running Ubuntu 26.04 LTS with an Intel CPU
and an NVIDIA RTX PRO 3000 Blackwell Mobile GPU, Youtube Music sound in
the browser(Firefox and Chromium) freezes for ~1 second when opening the
Settings menu or typing a search query in the application grid.
Consecutive clicks do not cause a freeze, but waiting a few seconds(20?)
allows the GPU to sleep, causing the freeze to return on the next
interaction.
1. Monitoring /sys/class/drm/card2/device/power_state showed that the 1-second
desktop freeze occurs exactly during the D3cold -> D0 state transition when the
hardware wakes up.
2. Running 'sudo fuser -v /dev/nvidia*' during idle showed gnome-shell and
ptyxis holding minor memory allocations on the card, trapping it in an active
D0 loop under standard management.
3. Out of the box, nvidia-persistenced.service lacks a standard systemd
[Install] target configuration, meaning the driver stack completely unloads
when idling.
Working Workaround applied:
The freeze is entirely resolved by overriding the driver profile to use
Coarse-Grained power management (forcing the card to stay in D0 when background
desktop hooks are present) and manually updating the systemd services:
* Created /etc/modprobe.d/nvidia-runtimepm.conf with 'options nvidia
NVreg_DynamicPowerManagement=0x01'
* Manually appended '[Install] WantedBy=multi-user.target' to
nvidia-persistenced.service via systemctl edit.
Setting NVreg_DynamicPowerManagement=0x03 did NOT resolve the freeze.
This workaround potentially increases the power usage, thus reducing the
battery.
** Affects: nvidia-graphics-drivers-595 (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
On a hybrid-graphics laptop running Ubuntu 26.04 LTS with an Intel CPU
and an NVIDIA RTX PRO 3000 Blackwell Mobile GPU, the entire user
- interface freezes for exactly ~1 second when opening the Quick Settings
- menu or typing a search query in the application grid.
+ interface freezes for exactly ~1 second when opening the Settings menu
+ or typing a search query in the application grid.
Consecutive clicks do not cause a freeze, but waiting a few seconds(20?)
allows the GPU to sleep, causing the freeze to return on the next
interaction.
1. Monitoring /sys/class/drm/card2/device/power_state showed that the
1-second desktop freeze occurs exactly during the D3cold -> D0 state transition
when the hardware wakes up.
2. Running 'sudo fuser -v /dev/nvidia*' during idle showed gnome-shell and
ptyxis holding minor memory allocations on the card, trapping it in an active
D0 loop under standard management.
3. Out of the box, nvidia-persistenced.service lacks a standard systemd
[Install] target configuration, meaning the driver stack completely unloads
when idling.
Working Workaround applied:
The freeze is entirely resolved by overriding the driver profile to use
Coarse-Grained power management (forcing the card to stay in D0 when background
desktop hooks are present) and manually updating the systemd services:
* Created /etc/modprobe.d/nvidia-runtimepm.conf with 'options nvidia
NVreg_DynamicPowerManagement=0x01'
* Manually appended '[Install] WantedBy=multi-user.target' to
nvidia-persistenced.service via systemctl edit.
Setting NVreg_DynamicPowerManagement=0x03 did NOT resolve the freeze.
This workaround potentially increases the power usage, thus reducing the
battery.
** Description changed:
On a hybrid-graphics laptop running Ubuntu 26.04 LTS with an Intel CPU
and an NVIDIA RTX PRO 3000 Blackwell Mobile GPU, the entire user
- interface freezes for exactly ~1 second when opening the Settings menu
- or typing a search query in the application grid.
+ interface freezes(and Youtube Music sound) for exactly ~1 second when
+ opening the Settings menu or typing a search query in the application
+ grid.
Consecutive clicks do not cause a freeze, but waiting a few seconds(20?)
allows the GPU to sleep, causing the freeze to return on the next
interaction.
1. Monitoring /sys/class/drm/card2/device/power_state showed that the
1-second desktop freeze occurs exactly during the D3cold -> D0 state transition
when the hardware wakes up.
2. Running 'sudo fuser -v /dev/nvidia*' during idle showed gnome-shell and
ptyxis holding minor memory allocations on the card, trapping it in an active
D0 loop under standard management.
3. Out of the box, nvidia-persistenced.service lacks a standard systemd
[Install] target configuration, meaning the driver stack completely unloads
when idling.
Working Workaround applied:
The freeze is entirely resolved by overriding the driver profile to use
Coarse-Grained power management (forcing the card to stay in D0 when background
desktop hooks are present) and manually updating the systemd services:
* Created /etc/modprobe.d/nvidia-runtimepm.conf with 'options nvidia
NVreg_DynamicPowerManagement=0x01'
* Manually appended '[Install] WantedBy=multi-user.target' to
nvidia-persistenced.service via systemctl edit.
Setting NVreg_DynamicPowerManagement=0x03 did NOT resolve the freeze.
This workaround potentially increases the power usage, thus reducing the
battery.
** Description changed:
On a hybrid-graphics laptop running Ubuntu 26.04 LTS with an Intel CPU
- and an NVIDIA RTX PRO 3000 Blackwell Mobile GPU, the entire user
- interface freezes(and Youtube Music sound) for exactly ~1 second when
- opening the Settings menu or typing a search query in the application
- grid.
+ and an NVIDIA RTX PRO 3000 Blackwell Mobile GPU, Youtube Music in the
+ browser(Firefox and Chromium) sound freezes for ~1 second when opening
+ the Settings menu or typing a search query in the application grid.
Consecutive clicks do not cause a freeze, but waiting a few seconds(20?)
allows the GPU to sleep, causing the freeze to return on the next
interaction.
1. Monitoring /sys/class/drm/card2/device/power_state showed that the
1-second desktop freeze occurs exactly during the D3cold -> D0 state transition
when the hardware wakes up.
2. Running 'sudo fuser -v /dev/nvidia*' during idle showed gnome-shell and
ptyxis holding minor memory allocations on the card, trapping it in an active
D0 loop under standard management.
3. Out of the box, nvidia-persistenced.service lacks a standard systemd
[Install] target configuration, meaning the driver stack completely unloads
when idling.
Working Workaround applied:
The freeze is entirely resolved by overriding the driver profile to use
Coarse-Grained power management (forcing the card to stay in D0 when background
desktop hooks are present) and manually updating the systemd services:
* Created /etc/modprobe.d/nvidia-runtimepm.conf with 'options nvidia
NVreg_DynamicPowerManagement=0x01'
* Manually appended '[Install] WantedBy=multi-user.target' to
nvidia-persistenced.service via systemctl edit.
Setting NVreg_DynamicPowerManagement=0x03 did NOT resolve the freeze.
This workaround potentially increases the power usage, thus reducing the
battery.
** Description changed:
On a hybrid-graphics laptop running Ubuntu 26.04 LTS with an Intel CPU
- and an NVIDIA RTX PRO 3000 Blackwell Mobile GPU, Youtube Music in the
- browser(Firefox and Chromium) sound freezes for ~1 second when opening
- the Settings menu or typing a search query in the application grid.
+ and an NVIDIA RTX PRO 3000 Blackwell Mobile GPU, Youtube Music sound in
+ the browser(Firefox and Chromium) freezes for ~1 second when opening the
+ Settings menu or typing a search query in the application grid.
Consecutive clicks do not cause a freeze, but waiting a few seconds(20?)
allows the GPU to sleep, causing the freeze to return on the next
interaction.
1. Monitoring /sys/class/drm/card2/device/power_state showed that the
1-second desktop freeze occurs exactly during the D3cold -> D0 state transition
when the hardware wakes up.
2. Running 'sudo fuser -v /dev/nvidia*' during idle showed gnome-shell and
ptyxis holding minor memory allocations on the card, trapping it in an active
D0 loop under standard management.
3. Out of the box, nvidia-persistenced.service lacks a standard systemd
[Install] target configuration, meaning the driver stack completely unloads
when idling.
Working Workaround applied:
The freeze is entirely resolved by overriding the driver profile to use
Coarse-Grained power management (forcing the card to stay in D0 when background
desktop hooks are present) and manually updating the systemd services:
* Created /etc/modprobe.d/nvidia-runtimepm.conf with 'options nvidia
NVreg_DynamicPowerManagement=0x01'
* Manually appended '[Install] WantedBy=multi-user.target' to
nvidia-persistenced.service via systemctl edit.
Setting NVreg_DynamicPowerManagement=0x03 did NOT resolve the freeze.
This workaround potentially increases the power usage, thus reducing the
battery.
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https://bugs.launchpad.net/bugs/2159021
Title:
GNOME Shell Wayland session freezes for 1 second on Nvidia dGPU D3cold
wakeup delay (RTX PRO 3000 Blackwell)
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