Public bug reported:
Description: Ubuntu 24.04.4 LTS
Release: 24.04
On a Dell Inspiron 5770 (Intel UHD Graphics 620 / i915, Kaby Lake,
paired with an AMD Radeon R7 M-series dGPU in a hybrid graphics
configuration, Ubuntu 24.04.4 LTS, GNOME/Wayland), two related
regressions appear after upgrading to kernel `7.0.0-28-generic`. Both
are absent on the immediately preceding kernel, `6.17.0-40-generic`, on
the same install — confirmed by booting both kernels back-to-back.
**Issue: Internal panel does not wake after suspend/resume**
After a suspend (via lid close or `systemctl suspend`) and subsequent
wake, the internal eDP panel stays black. The system is otherwise fully
functional: external monitors (both directly connected via DP/HDMI and
via a DisplayLink dock) resume and display normally, the desktop session
remains responsive, and there is no indication of a system hang.
Diagnostics collected while in this broken state (kernel `7.0.0-28-generic`):
- `journalctl` across the suspend/resume boundary shows a clean resume cycle
(`PM: suspend entry (deep)` → `PM: suspend exit`), with no i915 or amdgpu
errors, no kernel oops, and no indication of a hang.
- `/sys/kernel/debug/dri/2/i915_error_state` is empty — no GPU reset/error
recorded.
- `/sys/kernel/debug/dri/2/i915_display_info` shows CRTC/plane state for
`eDP-1` as fully active post-resume: `hw: visible=yes`, with a valid 1920x1080
framebuffer matching the panel's native fixed mode. Both `uapi` and `hw` state
agree, ruling out a stuck/uncommitted atomic KMS state.
- `/sys/class/drm/card2-eDP-1/status` reports `connected`.
- `/sys/class/backlight/intel_backlight/bl_power` reports `0` (on), and
`brightness` reports max value (`1023`/`1023`).
- The issue reproduces identically with the DisplayLink dock fully disconnected
The driver's own internal state reports everything as active and
correctly configured, the failure appears to occur downstream of the
KMS/atomic-commit layer.
**Steps to reproduce:**
1. Boot into kernel `7.0.0-28-generic`.
2. Suspend the laptop (lid close or `systemctl suspend`).
3. Wake the laptop.
4. Internal panel remains black; external displays (if connected) resume
normally.
**Workaround:** Booting into kernel `6.17.0-40-generic` avoids both
issues entirely.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-7.0.0-28-generic 7.0.0-28.28~24.04.1
ProcVersionSignature: Ubuntu 7.0.0-28.28~24.04.1-generic 7.0.12
Uname: Linux 7.0.0-28-generic x86_64
ApportVersion: 2.28.2-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: kuba 3362 F.... wireplumber
/dev/snd/seq: kuba 3357 F.... pipewire
CRDA: N/A
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Sun Jul 26 12:00:29 2026
InstallationDate: Installed on 2024-12-05 (597 days ago)
InstallationMedia: Ubuntu 24.04.1 LTS "Noble Numbat" - Release amd64
(20240827.1)
MachineType: Dell Inc. Inspiron 5770
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-28-generic
root=UUID=a069ef96-4985-466e-b1e3-3e21c35692a0 ro quiet splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-7.0.0-28-generic N/A
linux-backports-modules-7.0.0-28-generic N/A
linux-firmware 20240318.git3b128b60-0ubuntu2.27
SourcePackage: linux-hwe-7.0
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/06/2023
dmi.bios.release: 1.14
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.14.0
dmi.board.name: 0XH3XD
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.14.0:bd04/06/2023:br1.14:svnDellInc.:pnInspiron5770:pvr:rvnDellInc.:rn0XH3XD:rvrA00:cvnDellInc.:ct10:cvr:sku0811:pfaInspiron:
dmi.product.family: Inspiron
dmi.product.name: Inspiron 5770
dmi.product.sku: 0811
dmi.sys.vendor: Dell Inc.
** Affects: linux-hwe-7.0 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble third-party-packages
** Description changed:
Description: Ubuntu 24.04.4 LTS
Release: 24.04
On a Dell Inspiron 5770 (Intel UHD Graphics 620 / i915, Kaby Lake,
paired with an AMD Radeon R7 M-series dGPU in a hybrid graphics
configuration, Ubuntu 24.04.4 LTS, GNOME/Wayland), two related
regressions appear after upgrading to kernel `7.0.0-28-generic`. Both
are absent on the immediately preceding kernel, `6.17.0-40-generic`, on
the same install — confirmed by booting both kernels back-to-back.
- **Issue 1: Internal panel does not wake after suspend/resume**
+ **Issue: Internal panel does not wake after suspend/resume**
After a suspend (via lid close or `systemctl suspend`) and subsequent
wake, the internal eDP panel stays black. The system is otherwise fully
functional: external monitors (both directly connected via DP/HDMI and
via a DisplayLink dock) resume and display normally, the desktop session
remains responsive, and there is no indication of a system hang.
Diagnostics collected while in this broken state (kernel `7.0.0-28-generic`):
- `journalctl` across the suspend/resume boundary shows a clean resume cycle
(`PM: suspend entry (deep)` → `PM: suspend exit`), with no i915 or amdgpu
errors, no kernel oops, and no indication of a hang.
- `/sys/kernel/debug/dri/2/i915_error_state` is empty — no GPU reset/error
recorded.
- `/sys/kernel/debug/dri/2/i915_display_info` shows CRTC/plane state for
`eDP-1` as fully active post-resume: `hw: visible=yes`, with a valid 1920x1080
framebuffer matching the panel's native fixed mode. Both `uapi` and `hw` state
agree, ruling out a stuck/uncommitted atomic KMS state.
- `/sys/class/drm/card2-eDP-1/status` reports `connected`.
- `/sys/class/backlight/intel_backlight/bl_power` reports `0` (on), and
`brightness` reports max value (`1023`/`1023`).
- The issue reproduces identically with the DisplayLink dock fully
disconnected
The driver's own internal state reports everything as active and
correctly configured, the failure appears to occur downstream of the
KMS/atomic-commit layer.
- **Issue 2: Backlight/brightness control**
-
- On the same kernel (`7.0.0-28-generic`), brightness control also does
- not behave correctly. The system shows brightness level adjusting in the
- UI, but the panel remains at max brightness. This may be related to
- Issue 1, as both involve the same eDP/backlight control path on this
- hardware.
-
**Steps to reproduce:**
1. Boot into kernel `7.0.0-28-generic`.
2. Suspend the laptop (lid close or `systemctl suspend`).
3. Wake the laptop.
4. Internal panel remains black; external displays (if connected) resume
normally.
**Workaround:** Booting into kernel `6.17.0-40-generic` avoids both
issues entirely.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-7.0.0-28-generic 7.0.0-28.28~24.04.1
ProcVersionSignature: Ubuntu 7.0.0-28.28~24.04.1-generic 7.0.12
Uname: Linux 7.0.0-28-generic x86_64
ApportVersion: 2.28.2-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
- USER PID ACCESS COMMAND
- /dev/snd/controlC0: kuba 3362 F.... wireplumber
- /dev/snd/seq: kuba 3357 F.... pipewire
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC0: kuba 3362 F.... wireplumber
+ /dev/snd/seq: kuba 3357 F.... pipewire
CRDA: N/A
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Sun Jul 26 12:00:29 2026
InstallationDate: Installed on 2024-12-05 (597 days ago)
InstallationMedia: Ubuntu 24.04.1 LTS "Noble Numbat" - Release amd64
(20240827.1)
MachineType: Dell Inc. Inspiron 5770
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-28-generic
root=UUID=a069ef96-4985-466e-b1e3-3e21c35692a0 ro quiet splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
- linux-restricted-modules-7.0.0-28-generic N/A
- linux-backports-modules-7.0.0-28-generic N/A
- linux-firmware 20240318.git3b128b60-0ubuntu2.27
+ linux-restricted-modules-7.0.0-28-generic N/A
+ linux-backports-modules-7.0.0-28-generic N/A
+ linux-firmware 20240318.git3b128b60-0ubuntu2.27
SourcePackage: linux-hwe-7.0
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/06/2023
dmi.bios.release: 1.14
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.14.0
dmi.board.name: 0XH3XD
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.14.0:bd04/06/2023:br1.14:svnDellInc.:pnInspiron5770:pvr:rvnDellInc.:rn0XH3XD:rvrA00:cvnDellInc.:ct10:cvr:sku0811:pfaInspiron:
dmi.product.family: Inspiron
dmi.product.name: Inspiron 5770
dmi.product.sku: 0811
dmi.sys.vendor: Dell Inc.
** Summary changed:
- Internal eDP panel fails to wake after suspend/resume, and brightness control
is broken, on kernel 7.0.0-28-generic
+ Internal eDP panel fails to wake after suspend/resume, on kernel
7.0.0-28-generic
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https://bugs.launchpad.net/bugs/2161832
Title:
Internal eDP panel fails to wake after suspend/resume, on kernel
7.0.0-28-generic
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