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 Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1496163 Title: i915 firmware is not copied to initrd To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1496163/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
