Public bug reported:
The ov08x40 front sensor (ACPI \_SB_.LNK1, HID OVTI08F4, IPU7 on Panther
Lake) is mounted upside down, but the kernel reports
camera_sensor_rotation = 0, so libcamera and other apps show an inverted
image (Dell's own v4l2-relayd config doesn't flip it either).
ACPI analysis (SSDT, \_SB_.LNK1): both _PLD Rotation (RPOS = L1DG) and
SSDB degree (PAR[0x54] = CDEG (L1DG)) derive from the BIOS variable
L1DG, which is 0 on this machine. So the firmware reports "not rotated"
in both places.
Two ways to fix it:
1. Kernel: add a DMI quirk to upside_down_sensor_dmi_ids in
drivers/media/pci/intel/ipu-bridge.c ("Dell Inc." / "XPS 16 DA16260" →
"OVTI08F4"), as was done for the DA16250 (f4d4912e7f06), and as proposed for
the Pro 14 Premium PA14260 with the same sensor (linux-media, 2026-09-04).
2. Generic: have the BIOS set L1DG = 4. Note that CDEG encodes the SSDB degree
as literal degrees (180 = 0xB4), while ipu_bridge_parse_rotation() only accepts
0/1, so the kernel would also need to accept 180 for this to work on Dell
firmware.
Hardware: Dell XPS 16 DA16260, SKU 0DBA, BIOS 1.9.0, kernel
7.0.0-1013-oem.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-oem-26.04 (not installed)
ProcVersionSignature: Ubuntu 7.0.0-1013.13-oem 7.0.14
Uname: Linux 7.0.0-1013-oem x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: GNOME
Date: Wed Sep 23 16:06:07 2026
InstallationDate: Installed on 2026-06-02 (113 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
ProcEnviron:
LANG=es_ES.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-ghostty
XDG_RUNTIME_DIR=<set>
SourcePackage: linux-meta-oem-7.0
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-meta-oem-7.0 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
** Description changed:
The ov08x40 front sensor (ACPI \_SB_.LNK1, HID OVTI08F4, IPU7 on Panther
Lake) is mounted upside down, but the kernel reports
camera_sensor_rotation = 0, so libcamera and other apps show an inverted
image (Dell's own v4l2-relayd config doesn't flip it either).
- ACPI analysis (SSDT, \_SB_.LNK1): both _PLD Rotation (RPOS = L1DG) and
+ ACPI analysis (SSDT, \_SB_.LNK1): both _PLD Rotation (RPOS = L1DG) and
SSDB degree (PAR[0x54] = CDEG (L1DG)) derive from the BIOS variable
L1DG, which is 0 on this machine. So the firmware reports "not rotated"
in both places.
Two ways to fix it:
1. Kernel: add a DMI quirk to upside_down_sensor_dmi_ids in
drivers/media/pci/intel/ipu-bridge.c ("Dell Inc." / "XPS 16 DA16260" →
"OVTI08F4"), as was done for the DA16250 (f4d4912e7f06), and as proposed for
the Pro 14 Premium PA14260 with the same sensor (linux-media, 2026-09-04).
2. Generic: have the BIOS set L1DG = 4. Note that CDEG encodes the SSDB
degree as literal degrees (180 = 0xB4), while ipu_bridge_parse_rotation() only
accepts 0/1, so the kernel would also need to accept 180 for this to work on
Dell firmware.
- Hardware: Dell XPS 16 DA16260, SKU 0DBA, BIOS 1.5.1, kernel
+ Hardware: Dell XPS 16 DA16260, SKU 0DBA, BIOS 1.9.0, kernel
7.0.0-1013-oem.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-oem-26.04 (not installed)
ProcVersionSignature: Ubuntu 7.0.0-1013.13-oem 7.0.14
Uname: Linux 7.0.0-1013-oem x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: GNOME
Date: Wed Sep 23 16:06:07 2026
InstallationDate: Installed on 2026-06-02 (113 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64
(20260423.1)
ProcEnviron:
- LANG=es_ES.UTF-8
- PATH=(custom, no user)
- SHELL=/bin/bash
- TERM=xterm-ghostty
- XDG_RUNTIME_DIR=<set>
+ LANG=es_ES.UTF-8
+ PATH=(custom, no user)
+ SHELL=/bin/bash
+ TERM=xterm-ghostty
+ XDG_RUNTIME_DIR=<set>
SourcePackage: linux-meta-oem-7.0
UpgradeStatus: No upgrade log present (probably fresh install)
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2168145
Title:
Dell XPS 16 DA16260: internal camera (ov08x40, OVTI08F4) image upside
down — BIOS reports 0° rotation
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-meta-oem-7.0/+bug/2168145/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
