[Bug 2160441] [NEW] USB-C PD negotiation fails to marginal-quality power sources on ASUS ProArt PX13 (HN7306WV) - ucsi_acpi GET_CURRENT_CAM failure, other laptops unaffected on same power source

Public bug reported: Release: Description: Ubuntu 26.04 LTS Release: 26.04 Package version: linux-image-generic: Installed: (none) Candidate: 7.0.0-27.27 Version table: 7.0.0-27.27 500 500 http://id.archive.ubuntu.com/ubuntu resolute-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu resolute-security/main amd64 Packages 7.0.0-14.14 500 500 http://id.archive.ubuntu.com/ubuntu resolute/main amd64 Packages What I expected to happen: USB-C PD charging should negotiate full wattage on any compliant charger, matching the behavior of other laptops on the same power source. What happened instead: On a specific AC power source (tested at a cafe), USB-C charging on ASUS ProArt PX13 fails to negotiate above the USB-C default fallback rate (15W / 5V-3A), regardless of charger brand used (tested with both Kiip 100W and Anker 100W chargers — same result on both). For comparison, two other laptops (Lenovo Yoga, ASUS ROG Flow Z13) charge normally at full rate on the exact same power source, using their own respective chargers (Anker 100W and a 64W charger respectively). At a different location (same building, different floor), the same ProArt + Kiip 100W combination charges normally at full rate — suggesting the ProArt's PD negotiation is less tolerant of marginal power quality compared to the other devices tested, rather than a simple charger/cable compatibility issue. dmesg shows the following error at the time of the failed negotiation: ucsi_acpi USBC000:00: GET_CURRENT_CAM command failed Hardware: ASUS ProArt PX13 (HN7306WV) BIOS version: HN7306WV.316 (confirmed latest available from ASUS support site as of testing) Kernel: 7.0.0-27-generic dGPU: disabled (via prime-select intel) at time of testing ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: linux-image-7.0.0-27-generic 7.0.0-27.27 ProcVersionSignature: Ubuntu 7.0.0-27.27-generic 7.0.6 Uname: Linux 7.0.0-27-generic x86_64 ApportVersion: 2.34.0-0ubuntu2 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Sun Jul 12 15:44:09 2026 InstallationDate: Installed on 2026-05-22 (51 days ago) InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1) MachineType: ASUSTeK COMPUTER INC. ProArt PX13 HN7306WV_HN7306WV ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-27-generic root=UUID=092e632f-6509-4603-95f7-c4038dc8f1a3 ro quiet splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/18/2025 dmi.bios.release: 5.35 dmi.bios.vendor: American Megatrends International, LLC. dmi.bios.version: HN7306WV.316 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: HN7306WV dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 31 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.ec.firmware.release: 3.25 dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvrHN7306WV.316:bd03/18/2025:br5.35:efr3.25:svnASUSTeKCOMPUTERINC.:pnProArtPX13HN7306WV_HN7306WV:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnHN7306WV:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct31:cvr1.0:sku:pfaProArtPX13: dmi.product.family: ProArt PX13 dmi.product.name: ProArt PX13 HN7306WV_HN7306WV dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug resolute wayland-session -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2160441 Title: USB-C PD negotiation fails to marginal-quality power sources on ASUS ProArt PX13 (HN7306WV) - ucsi_acpi GET_CURRENT_CAM failure, other laptops unaffected on same power source Status in linux package in Ubuntu: New Bug description: Release: Description: Ubuntu 26.04 LTS Release: 26.04 Package version: linux-image-generic: Installed: (none) Candidate: 7.0.0-27.27 Version table: 7.0.0-27.27 500 500 http://id.archive.ubuntu.com/ubuntu resolute-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu resolute-security/main amd64 Packages 7.0.0-14.14 500 500 http://id.archive.ubuntu.com/ubuntu resolute/main amd64 Packages What I expected to happen: USB-C PD charging should negotiate full wattage on any compliant charger, matching the behavior of other laptops on the same power source. What happened instead: On a specific AC power source (tested at a cafe), USB-C charging on ASUS ProArt PX13 fails to negotiate above the USB-C default fallback rate (15W / 5V-3A), regardless of charger brand used (tested with both Kiip 100W and Anker 100W chargers — same result on both). For comparison, two other laptops (Lenovo Yoga, ASUS ROG Flow Z13) charge normally at full rate on the exact same power source, using their own respective chargers (Anker 100W and a 64W charger respectively). At a different location (same building, different floor), the same ProArt + Kiip 100W combination charges normally at full rate — suggesting the ProArt's PD negotiation is less tolerant of marginal power quality compared to the other devices tested, rather than a simple charger/cable compatibility issue. dmesg shows the following error at the time of the failed negotiation: ucsi_acpi USBC000:00: GET_CURRENT_CAM command failed Hardware: ASUS ProArt PX13 (HN7306WV) BIOS version: HN7306WV.316 (confirmed latest available from ASUS support site as of testing) Kernel: 7.0.0-27-generic dGPU: disabled (via prime-select intel) at time of testing ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: linux-image-7.0.0-27-generic 7.0.0-27.27 ProcVersionSignature: Ubuntu 7.0.0-27.27-generic 7.0.6 Uname: Linux 7.0.0-27-generic x86_64 ApportVersion: 2.34.0-0ubuntu2 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Sun Jul 12 15:44:09 2026 InstallationDate: Installed on 2026-05-22 (51 days ago) InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1) MachineType: ASUSTeK COMPUTER INC. ProArt PX13 HN7306WV_HN7306WV ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-27-generic root=UUID=092e632f-6509-4603-95f7-c4038dc8f1a3 ro quiet splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/18/2025 dmi.bios.release: 5.35 dmi.bios.vendor: American Megatrends International, LLC. dmi.bios.version: HN7306WV.316 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: HN7306WV dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 31 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.ec.firmware.release: 3.25 dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvrHN7306WV.316:bd03/18/2025:br5.35:efr3.25:svnASUSTeKCOMPUTERINC.:pnProArtPX13HN7306WV_HN7306WV:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnHN7306WV:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct31:cvr1.0:sku:pfaProArtPX13: dmi.product.family: ProArt PX13 dmi.product.name: ProArt PX13 HN7306WV_HN7306WV dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. 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