Public bug reported: Thanks in advance for taking a look. The webcam on my X1 Nano (Gen 2, OV2740 behind IPU6) worked on a clean Ubuntu 26.04 install. After a routine `apt upgrade` rolled the HWE kernel forward to 7.0.0-14 and then 7.0.0-15, it stopped producing frames. Nothing else camera-related changed in that upgrade. On the surface everything still looks fine. libcamera and pipewire both see an `ov2740` device. /dev/video* are populated. The IPU6 driver is happy: intel-ipu6 0000:00:05.0: Found supported sensor INT3474:01 intel-ipu6 0000:00:05.0: Connected 1 cameras But every app that tries to open the camera fails the same way: spa.v4l2: /dev/video0: VIDIOC_S_PARM: Inappropriate ioctl for device spa.v4l2: '/dev/video0' VIDIOC_STREAMON: Link has been severed Cheese, Firefox, Chromium and Zoom all behave identically. BIOS privacy is off and the FN-toggle has been checked. I'm not sure I'm reading this right, but it looks like the VSC chain might not be coming up. `mei_vsc_hw` is loaded but unbound. `mei_vsc`, `intel_vsc`, `ivsc_csi`, `ivsc_ace` aren't loaded at all. The ov2740 probe complains about missing rails (AVDD/DOVDD/DVDD, "supply X not found, using dummy regulator"), which I think the VSC normally provides. Tracing back, the ACPI path looks like: \_SB_.PC00.SPI1.SPFD HID INTC1094 \_SB_.PC00.SPI1.SPFD.CVFD HID INTC1095 `INTC1094` is one of `mei_vsc_hw`'s alias matches. But the parent device for `\_SB_.PC00.SPI1` shows an empty `_HID` in /sys, so I don't think the kernel is instantiating a SPI controller on that node. If that's right, INTC1094 and INTC1095 never become spi_devices and `mei_vsc_hw` has nothing to bind to. That's my best guess at where it falls over, but I could easily be off. A couple of side notes in case they matter: * The PCH SPI controller (PCI 0000:00:1f.5, spi0) has one child for the BIOS flash. spi-nor fails JEDEC identification on it ("unrecognized JEDEC id bytes: f7 30 30 09 03 00"). I think this is unrelated. * There's an Intel USB-LJCA bridge (8086:0b63) at HS08 / INTC1098 that brings up spi1 via spi_ljca. spi1 has no children (waiting_for_supplier=0). I'm not sure if the VSC is supposed to live here on this platform. I don't know what changed between the kernel I originally installed with and 7.0.0-14. apt history puts the HWE hop to 7.0.0-14.14 on 2026-04-23 and nothing else camera-related changed in that transaction. Happy to do whatever is helpful. Attached `diagnostics.txt` has DMI, package versions, lsmod, lspci/lsusb, the spi_master tree, the relevant ACPI nodes, and the IPU6/MEI/VSC/OV2740/LJCA kernel and libcamera/pipewire log lines. --- ProblemType: Bug ApportVersion: 2.34.0-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: atb 3887 F.... pipewire atb 3902 F.... wireplumber /dev/snd/seq: atb 3887 F.... pipewire CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 26.04 InstallationDate: Installed on 2026-05-17 (2 days ago) InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1) MachineType: LENOVO 21E8002YSG Package: linux (not installed) ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-15-generic root=UUID=61e8b5c4-2752-445a-93d2-a68c8bb7dd3c ro quiet splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M ProcVersionSignature: Ubuntu 7.0.0-15.15-generic 7.0.0 RebootRequiredPkgs: Error: path contained symlinks. Tags: resolute wayland-session Uname: Linux 7.0.0-15-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin lxd plugdev sudo users _MarkForUpload: True dmi.bios.date: 12/03/2025 dmi.bios.release: 1.33 dmi.bios.vendor: LENOVO dmi.bios.version: N3IET53W (1.33 ) dmi.board.asset.tag: Not Available dmi.board.name: 21E8002YSG dmi.board.vendor: LENOVO dmi.board.version: SDK0T76530 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.ec.firmware.release: 1.21 dmi.modalias: dmi:bvnLENOVO:bvrN3IET53W(1.33):bd12/03/2025:br1.33:efr1.21:svnLENOVO:pn21E8002YSG:pvrThinkPadX1NanoGen2:rvnLENOVO:rn21E8002YSG:rvrSDK0T76530WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21E8_BU_Think_FM_ThinkPadX1NanoGen2:pfaThinkPadX1NanoGen2: dmi.product.family: ThinkPad X1 Nano Gen 2 dmi.product.name: 21E8002YSG dmi.product.sku: LENOVO_MT_21E8_BU_Think_FM_ThinkPad X1 Nano Gen 2 dmi.product.version: ThinkPad X1 Nano Gen 2 dmi.sys.vendor: LENOVO ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: acpi apport-collected camera hwe-26.04 ipu6 mei-vsc ov2740 regression-update resolute thinkpad wayland-session webcam x1-nano ** Attachment added: "Diagnostics: DMI, packages, lsmod, lspci/lsusb, SPI tree, ACPI VSC nodes, kernel + libcamera/pipewire logs" https://bugs.launchpad.net/bugs/2153096/+attachment/5971382/+files/diagnostics.txt -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2153096 Title: IPU6 webcam (OV2740) stopped working after HWE upgrade to 7.0.0-15 on X1 Nano Status in linux package in Ubuntu: New Bug description: Thanks in advance for taking a look. The webcam on my X1 Nano (Gen 2, OV2740 behind IPU6) worked on a clean Ubuntu 26.04 install. After a routine `apt upgrade` rolled the HWE kernel forward to 7.0.0-14 and then 7.0.0-15, it stopped producing frames. Nothing else camera-related changed in that upgrade. On the surface everything still looks fine. libcamera and pipewire both see an `ov2740` device. /dev/video* are populated. The IPU6 driver is happy: intel-ipu6 0000:00:05.0: Found supported sensor INT3474:01 intel-ipu6 0000:00:05.0: Connected 1 cameras But every app that tries to open the camera fails the same way: spa.v4l2: /dev/video0: VIDIOC_S_PARM: Inappropriate ioctl for device spa.v4l2: '/dev/video0' VIDIOC_STREAMON: Link has been severed Cheese, Firefox, Chromium and Zoom all behave identically. BIOS privacy is off and the FN-toggle has been checked. I'm not sure I'm reading this right, but it looks like the VSC chain might not be coming up. `mei_vsc_hw` is loaded but unbound. `mei_vsc`, `intel_vsc`, `ivsc_csi`, `ivsc_ace` aren't loaded at all. The ov2740 probe complains about missing rails (AVDD/DOVDD/DVDD, "supply X not found, using dummy regulator"), which I think the VSC normally provides. Tracing back, the ACPI path looks like: \_SB_.PC00.SPI1.SPFD HID INTC1094 \_SB_.PC00.SPI1.SPFD.CVFD HID INTC1095 `INTC1094` is one of `mei_vsc_hw`'s alias matches. But the parent device for `\_SB_.PC00.SPI1` shows an empty `_HID` in /sys, so I don't think the kernel is instantiating a SPI controller on that node. If that's right, INTC1094 and INTC1095 never become spi_devices and `mei_vsc_hw` has nothing to bind to. That's my best guess at where it falls over, but I could easily be off. A couple of side notes in case they matter: * The PCH SPI controller (PCI 0000:00:1f.5, spi0) has one child for the BIOS flash. spi-nor fails JEDEC identification on it ("unrecognized JEDEC id bytes: f7 30 30 09 03 00"). I think this is unrelated. * There's an Intel USB-LJCA bridge (8086:0b63) at HS08 / INTC1098 that brings up spi1 via spi_ljca. spi1 has no children (waiting_for_supplier=0). I'm not sure if the VSC is supposed to live here on this platform. I don't know what changed between the kernel I originally installed with and 7.0.0-14. apt history puts the HWE hop to 7.0.0-14.14 on 2026-04-23 and nothing else camera-related changed in that transaction. Happy to do whatever is helpful. Attached `diagnostics.txt` has DMI, package versions, lsmod, lspci/lsusb, the spi_master tree, the relevant ACPI nodes, and the IPU6/MEI/VSC/OV2740/LJCA kernel and libcamera/pipewire log lines. --- ProblemType: Bug ApportVersion: 2.34.0-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: atb 3887 F.... pipewire atb 3902 F.... wireplumber /dev/snd/seq: atb 3887 F.... pipewire CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 26.04 InstallationDate: Installed on 2026-05-17 (2 days ago) InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1) MachineType: LENOVO 21E8002YSG Package: linux (not installed) ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-15-generic root=UUID=61e8b5c4-2752-445a-93d2-a68c8bb7dd3c ro quiet splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M ProcVersionSignature: Ubuntu 7.0.0-15.15-generic 7.0.0 RebootRequiredPkgs: Error: path contained symlinks. Tags: resolute wayland-session Uname: Linux 7.0.0-15-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin lxd plugdev sudo users _MarkForUpload: True dmi.bios.date: 12/03/2025 dmi.bios.release: 1.33 dmi.bios.vendor: LENOVO dmi.bios.version: N3IET53W (1.33 ) dmi.board.asset.tag: Not Available dmi.board.name: 21E8002YSG dmi.board.vendor: LENOVO dmi.board.version: SDK0T76530 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.ec.firmware.release: 1.21 dmi.modalias: dmi:bvnLENOVO:bvrN3IET53W(1.33):bd12/03/2025:br1.33:efr1.21:svnLENOVO:pn21E8002YSG:pvrThinkPadX1NanoGen2:rvnLENOVO:rn21E8002YSG:rvrSDK0T76530WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21E8_BU_Think_FM_ThinkPadX1NanoGen2:pfaThinkPadX1NanoGen2: dmi.product.family: ThinkPad X1 Nano Gen 2 dmi.product.name: 21E8002YSG dmi.product.sku: LENOVO_MT_21E8_BU_Think_FM_ThinkPad X1 Nano Gen 2 dmi.product.version: ThinkPad X1 Nano Gen 2 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2153096/+subscriptions
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