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Re: [BUG] Redmi Book Pro 16 2024 platform_profile write fails on Linux 7.1.7 To: Martiya Aryan Mehr , platform-driver-x86@vger.kernel.org Cc: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org References: Content-Language: en-US From: Armin Wolf In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K1:FGZQUttSrsKntN8CPNjPxROrX+3bvwGMJYhXqPUYqQvxdnYCXkI 6Pmm7tfY13V4WvnB0tWTVaZCfD5w1HWDTLoBscwTtELfLhDukTArWAjtTghV+igAn1dI2Wg SStjW+X4hyfQp7fb+2WWNXsPYs8XQ5KEQQt5gmiMQwPDo4VietNOoyybCVcGHoECiHuDIwC /U9O9uluXBNE6f+cLrA6Q== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:tGiXiDEzt6k=;3FZMKNNlecGvMpwgIRANi/Pr7Kf QzYnDgqVDSUANI2aOrkqzzozEpLhMupvWcVQDWZlvWLmnUXzP6Pc+DArY3L3jG/HFNzNeKYNz 911ztOVtGJAsrLSAY66AM4Y1fHeTYBQR0QPULpMCXi7D7f3e//nEnbBfRjNa4CG1bPdqXLSS1 yp+2KgNBZjhhMg1DeNoklUeFVy9y2mlQdm4a6Ep1VKaFUnRWjtnceS6ASt94FwS8gqja89uir yWfZ+Ku/xL4Xi7GFbkH3oE/jOXtairiE76ZNTNL4AdM3imeoGToC2b3sXmHCR/hA+e2pzESAf 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the Arch Linux 7.1.7 kernel. > > Hardware: > > Laptop: Xiaomi Redmi Book Pro 16 2024 > Model: TM2309 > CPU: Intel Core Ultra 7 155H (Meteor Lake) > BIOS: RMAMT6B0P0B0B > BIOS date: 06/10/2025 > > > Kernel comparison: > > Problematic kernel: > > Linux 7.1.7-arch1-1 > > Reference kernel: > > Linux 6.18.43-1-lts > > On Linux 6.18.43 LTS the platform_profile sysfs interface is not > exposed, so the issue cannot be reproduced there. > > Installed packages: > > linux 7.1.7.arch1-1 > linux-lts 6.18.43-1 > power-profiles-daemon 0.30-1 > > > Problem description: > > On Linux 7.1.7 the platform_profile interface exists and exposes the > following profiles: > > $ cat /sys/firmware/acpi/platform_profile_choices > > low-power balanced balanced-performance performance > > > Current profile: > > $ cat /sys/firmware/acpi/platform_profile > > balanced > > > Reading the current profile works correctly, but writing some profiles fails. > > > Working example: > > $ echo low-power | sudo tee /sys/firmware/acpi/platform_profile > > Result: > > low-power > > > Verification: > > $ cat /sys/firmware/acpi/platform_profile > > low-power > > > However, the following profiles fail: > > $ echo performance | sudo tee /sys/firmware/acpi/platform_profile > > Result: > > performance > tee: /sys/firmware/acpi/platform_profile: Operation not supported > > > Same behavior with: > > $ echo balanced-performance | sudo tee /sys/firmware/acpi/platform_profile > > Result: > > balanced-performance > tee: /sys/firmware/acpi/platform_profile: Operation not supported > > > The same issue causes power-profiles-daemon failure: > > $ powerprofilesctl set performance > > Failed to communicate with power-profiles-daemon: > > Failed to activate platform driver 'platform_profile': > Failed to write to acpi_platform_profile: > Error writing '/sys/firmware/acpi/platform_profile': > Operation not supported (15) > > > Expected behavior: > > All profiles listed in: > > /sys/firmware/acpi/platform_profile_choices > > should be writable successfully, especially: > > balanced-performance > performance > > > Actual behavior: > > Writable: > > - low-power > - balanced > > Not writable: > > - balanced-performance > - performance > > > Module information: > > Linux 7.1.7: > > $ modinfo redmi_wmi > > filename: > /lib/modules/7.1.7-arch1-1/kernel/drivers/platform/x86/redmi-wmi.ko.zst > > srcversion: > E64350B38255B1100E64863 > > > Linux 6.18.43 LTS: > > filename: > /lib/modules/6.18.43-1-lts/kernel/drivers/platform/x86/redmi-wmi.ko.zst > > srcversion: > 369C9F3502463ADD78FDC0F > > > Dmesg information: > > The laptop is detected correctly: > > DMI: > XIAOMI Redmi Book Pro 16 2024/TM2309 > > WMI device: > > input: > Redmibook WMI keys > > > No specific redmi_wmi error appears in dmesg. > > > Additional observation: > > On Linux 7.1.7: > > $ powerprofilesctl > > performance: > CpuDriver: intel_pstate > > balanced: > CpuDriver: intel_pstate > PlatformDriver: placeholder > > > The platform profile backend is detected but cannot switch to > performance or balanced-performance. > > > Possible affected components: > > - drivers/platform/x86/redmi-wmi > - platform_profile framework > - processor_thermal_soc_slider > - ACPI platform profile handling > > > I can provide additional logs, ACPI tables, or help with testing > patches if needed. > > Thank you. Sorry for the late reply. Could you please share the output of "acpidump"? Thanks, Armin Wolf