Attached is a debdiff for a SRU for trusty. ** Patch added: "initramfs-tools_0.103ubuntu4.5_0.103ubuntu4.6.debdiff" https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1496163/+attachment/4792198/+files/initramfs-tools_0.103ubuntu4.5_0.103ubuntu4.6.debdiff
** Description changed: - On Skylake, the skl_dmc firmware is failing to load. From dmesg: + [ Impact ] + + On Skylake, skl_dmc firmware is not incorporated into the initramfs. + This is because it is a symlink to a versioned blob and the initramfs- + tools hook does not dereference symlinks. As the driver is actually + loaded from the initramfs, the firmware is missing for the lifetime of + the boot, which means that the GPU cannot enter its lowest available + power states plus some hotplugging scenarios are broken. This all + manifests itself as such in dmesg: [ 0.728803] i915 0000:00:02.0: Direct firmware load for i915/skl_dmc_ver1.bin failed with error -2 [ 0.728817] [drm:i915_firmware_load_error_print [i915]] *ERROR* failed to load firmware i915/skl_dmc_ver1.bin (0) - This means the GPU can't enter its lowest available power states, plus - many display hotplugging scenarios (that only the skl_dmc firmware can - handle) are broken. + [ Test Case ] - On a whim I tried some other firmware versions: + After the fix has been applied and the initrd regenerates, the firmware + should load successfully after a reboot. - 1) pointed the skl_dmc_ver1.bin symlink to skl_dmc_ver1_18.bin (instead - of skl_dmc_ver1_19.bin) + [ Regression Potential ] - 2) downloaded the latest (skl_dmc_ver1_21.bin) and pointed the - skl_dmc_ver1.bin symlink to it - - But neither corrected the situation. - - Thanks! - - ProblemType: Bug - DistroRelease: Ubuntu 15.10 - Package: linux-image-4.2.0-10-generic 4.2.0-10.11 - ProcVersionSignature: Ubuntu 4.2.0-10.11-generic 4.2.0 - Uname: Linux 4.2.0-10-generic x86_64 - ApportVersion: 2.18.1-0ubuntu1 - Architecture: amd64 - AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC0: oem 1251 F.... pulseaudio - CurrentDesktop: Unity - Date: Tue Sep 15 16:21:24 2015 - HibernationDevice: RESUME=UUID=637df075-0afa-420f-a3ca-342be8bf297f - IwConfig: - enp4s0 no wireless extensions. - - lo no wireless extensions. - Lsusb: - Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub - Bus 001 Device 003: ID 04f2:0833 Chicony Electronics Co., Ltd - Bus 001 Device 002: ID 046d:c05a Logitech, Inc. M90/M100 Optical Mouse - Bus 001 Device 004: ID 058f:6364 Alcor Micro Corp. AU6477 Card Reader Controller - Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub - MachineType: System manufacturer System Product Name - ProcFB: 0 inteldrmfb - ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-10-generic root=UUID=f967534a-9cc3-4d1a-a7f3-72d28959e3c6 ro i915.verbose_state_checks=1 quiet splash vt.handoff=7 - RelatedPackageVersions: - linux-restricted-modules-4.2.0-10-generic N/A - linux-backports-modules-4.2.0-10-generic N/A - linux-firmware 1.147 - RfKill: - - SourcePackage: linux - UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' - UpgradeStatus: No upgrade log present (probably fresh install) - dmi.bios.date: 08/19/2015 - dmi.bios.vendor: American Megatrends Inc. - dmi.bios.version: 0403 - dmi.board.asset.tag: Default string - dmi.board.name: Z170-P D3 - dmi.board.vendor: ASUSTeK COMPUTER INC. - dmi.board.version: Rev X.0x - dmi.chassis.asset.tag: Default string - dmi.chassis.type: 3 - dmi.chassis.vendor: Default string - dmi.chassis.version: Default string - dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0403:bd08/19/2015:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnZ170-PD3:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring: - dmi.product.name: System Product Name - dmi.product.version: System Version - dmi.sys.vendor: System manufacturer + Unlikely, as the fix is part of Ubuntu since Wily. ** Tags removed: wily -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to initramfs-tools in Ubuntu. https://bugs.launchpad.net/bugs/1496163 Title: i915 firmware is not copied to initrd Status in Skylinux: Invalid Status in initramfs-tools package in Ubuntu: Fix Released Status in initramfs-tools source package in Trusty: In Progress Status in initramfs-tools source package in Vivid: In Progress Status in initramfs-tools source package in Wily: Fix Released Bug description: [ Impact ] On Skylake, skl_dmc firmware is not incorporated into the initramfs. This is because it is a symlink to a versioned blob and the initramfs- tools hook does not dereference symlinks. As the driver is actually loaded from the initramfs, the firmware is missing for the lifetime of the boot, which means that the GPU cannot enter its lowest available power states plus some hotplugging scenarios are broken. This all manifests itself as such in dmesg: [ 0.728803] i915 0000:00:02.0: Direct firmware load for i915/skl_dmc_ver1.bin failed with error -2 [ 0.728817] [drm:i915_firmware_load_error_print [i915]] *ERROR* failed to load firmware i915/skl_dmc_ver1.bin (0) [ Test Case ] After the fix has been applied and the initrd regenerates, the firmware should load successfully after a reboot. [ Regression Potential ] Unlikely, as the fix is part of Ubuntu since Wily. 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