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[Launchpad Bug Tracker <1457781@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 3.19.0-20.20

---------------
linux (3.19.0-20.20) vivid; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1459957
  * Revert "SAUCE: Call i915_bpo specific functions from the hda driver"
    - LP: #1457369

linux (3.19.0-19.19) vivid; urgency=low

  [ Brad Figg ]

  * Release Tracking Bug
    - LP: #1458964

  [ Duc Dang ]

  * SAUCE: (no-up) [PCIE] APM X-Gene: Remove debug messages in MSI
    interrupt handler path.
    - LP: #1451593

  [ Luis Henriques ]

  * [Config] updateconfigs for 3.19.7 stable update

  [ Paolo Pisati ]

  * [Config] armhf: CPUFREQ_DT=y
    - LP: #1457781
  * annotations: enforce CPUFREQ_DT
    - LP: #1457781

  [ Tanmay Inamdar ]

  * SAUCE: (no-up) Add MSI/MSI-X driver for APM PCI bus
    - LP: #1451593

  [ Timo Aaltonen ]

  * SAUCE: i915_bpo: Rebase to v4.1-rc4.
    - LP: #1456123
  * SAUCE: i915_bpo: Revert dma-buf: cleanup dma_buf_export() to make it
    easily extensible
    - LP: #1456123

  [ Tuan Phan ]

  * SAUCE: (no-up) pci-xgene-msi: fixed deadlock in irq_set_affinity
    - LP: #1451593

  [ Upstream Kernel Changes ]

  * Revert "nfs: replace nfs_add_stats with nfs_inc_stats when add one"
    - LP: #1454699
  * cpufreq: powernv: Report cpu frequency throttling
    - LP: #1452547
  * x86: kvm: Revert "remove sched notifier for cross-cpu migrations"
    - LP: #1450584
  * x86: vdso: fix pvclock races with task migration
    - LP: #1450584
  * ip_forward: Drop frames with attached skb->sk
    - LP: #1454699
  * net: add skb_checksum_complete_unset
    - LP: #1454699
  * ppp: call skb_checksum_complete_unset in ppp_receive_frame
    - LP: #1454699
  * tcp: fix possible deadlock in tcp_send_fin()
    - LP: #1454699
  * tcp: avoid looping in tcp_send_fin()
    - LP: #1454699
  * net: do not deplete pfmemalloc reserve
    - LP: #1454699
  * net: fix crash in build_skb()
    - LP: #1454699
  * pxa168: fix double deallocation of managed resources
    - LP: #1454699
  * net/mlx4_en: Prevent setting invalid RSS hash function
    - LP: #1454699
  * md: fix md io stats accounting broken
    - LP: #1454699
  * x86/asm/decoder: Fix and enforce max instruction size in the insn
    decoder
    - LP: #1454699
  * sched/idle/x86: Restore mwait_idle() to fix boot hangs, to improve
    power savings and to improve performance
    - LP: #1454699
  * sched/idle/x86: Optimize unnecessary mwait_idle() resched IPIs
    - LP: #1454699
  * perf/x86/intel: Fix Core2,Atom,NHM,WSM cycles:pp events
    - LP: #1454699
  * KVM: x86: Fix MSR_IA32_BNDCFGS in msrs_to_save
    - LP: #1454699
  * Btrfs: fix log tree corruption when fs mounted with -o discard
    - LP: #1454699
  * btrfs: don't accept bare namespace as a valid xattr
    - LP: #1454699
  * Btrfs: fix inode eviction infinite loop after cloning into it
    - LP: #1454699
  * Btrfs: fix inode eviction infinite loop after extent_same ioctl
    - LP: #1454699
  * usb: gadget: printer: enqueue printer's response for setup request
    - LP: #1454699
  * KVM: s390: fix handling of write errors in the tpi handler
    - LP: #1454699
  * KVM: s390: reinjection of irqs can fail in the tpi handler
    - LP: #1454699
  * KVM: s390: Zero out current VMDB of STSI before including level3 data.
    - LP: #1454699
  * KVM: s390: no need to hold the kvm->mutex for floating interrupts
    - LP: #1454699
  * KVM: s390: fix get_all_floating_irqs
    - LP: #1454699
  * s390/hibernate: fix save and restore of kernel text section
    - LP: #1454699
  * KVM: use slowpath for cross page cached accesses
    - LP: #1454699
  * KVM: arm/arm64: check IRQ number on userland injection
    - LP: #1454699
  * KVM: arm/arm64: vgic: vgic_init returns -ENODEV when no online vcpu
    - LP: #1454699
  * ARM: KVM: Fix size check in __coherent_cache_guest_page
    - LP: #1454699
  * arm64: KVM: Fix stage-2 PGD allocation to have per-page refcounting
    - LP: #1454699
  * arm64: KVM: Do not use pgd_index to index stage-2 pgd
    - LP: #1454699
  * arm/arm64: KVM: Keep elrsr/aisr in sync with software model
    - LP: #1454699
  * MIPS: KVM: Handle MSA Disabled exceptions from guest
    - LP: #1454699
  * MIPS: lose_fpu(): Disable FPU when MSA enabled
    - LP: #1454699
  * MIPS: Malta: Detect and fix bad memsize values
    - LP: #1454699
  * MIPS: asm: asm-eva: Introduce kernel load/store variants
    - LP: #1454699
  * MIPS: Loongson-3: Add IRQF_NO_SUSPEND to Cascade irqaction
    - LP: #1454699
  * MIPS: Hibernate: flush TLB entries earlier
    - LP: #1454699
  * staging: panel: fix lcd type
    - LP: #1454699
  * staging: android: sync: Fix memory corruption in
    sync_timeline_signal().
    - LP: #1454699
  * staging: vt6655: use ieee80211_tx_info to select packet type.
    - LP: #1454699
  * drivers/base: cacheinfo: validate device node for all the caches
    - LP: #1454699
  * cdc-wdm: fix endianness bug in debug statements
    - LP: #1454699
  * mmc: sunxi: Use devm_reset_control_get_optional() for reset control
    - LP: #1454699
  * spi: imx: read back the RX/TX watermark levels earlier
    - LP: #1454699
  * spi: spidev: fix possible arithmetic overflow for multi-transfer
    message
    - LP: #1454699
  * compal-laptop: Fix leaking hwmon device
    - LP: #1454699
  * compal-laptop: Check return value of power_supply_register
    - LP: #1454699
  * ring-buffer: Replace this_cpu_*() with __this_cpu_*()
    - LP: #1454699
  * power_supply: twl4030_madc: Check return value of power_supply_register
    - LP: #1454699
  * power_supply: lp8788-charger: Fix leaked power supply on probe fail
    - LP: #1454699
  * power_supply: ipaq_micro_battery: Fix leaking workqueue
    - LP: #1454699
  * power_supply: ipaq_micro_battery: Check return values in probe
    - LP: #1454699
  * NFS: fix BUG() crash in notify_change() with patch to chown_common()
    - LP: #1454699
  * ARM: fix broken hibernation
    - LP: #1454699
  * ARM: 8320/1: fix integer overflow in ELF_ET_DYN_BASE
    - LP: #1454699
  * ARM: mvebu: Disable CPU Idle on Armada 38x
    - LP: #1454699
  * ARM: S3C64XX: Use fixed IRQ bases to avoid conflicts on Cragganmore
    - LP: #1454699
  * ARM: at91/dt: sama5d3 xplained: add phy address for macb1
    - LP: #1454699
  * ARM: dts: dove: Fix uart[23] reg property
    - LP: #1454699
  * ARM: dts: fix mmc node updates for exynos5250-spring
    - LP: #1454699
  * usb: musb: core: fix TX/RX endpoint order
    - LP: #1454699
  * usb: phy: Find the right match in devm_usb_phy_match
    - LP: #1454699
  * usb: define a generic USB_RESUME_TIMEOUT macro
    - LP: #1454699
  * usb: musb: use new USB_RESUME_TIMEOUT
    - LP: #1454699
  * usb: host: oxu210hp: use new USB_RESUME_TIMEOUT
    - LP: #1454699
  * usb: host: fusbh200: use new USB_RESUME_TIMEOUT
    - LP: #1454699
  * usb: host: uhci: use new USB_RESUME_TIMEOUT
    - LP: #1454699
  * usb: host: fotg210: use new USB_RESUME_TIMEOUT
    - LP: #1454699
  * usb: host: r8a66597: use new USB_RESUME_TIMEOUT
    - LP: #1454699
  * usb: host: isp116x: use new USB_RESUME_TIMEOUT
    - LP: #1454699
  * usb: host: xhci: use new USB_RESUME_TIMEOUT
    - LP: #1454699
  * usb: host: ehci: use new USB_RESUME_TIMEOUT
    - LP: #1454699
  * usb: host: sl811: use new USB_RESUME_TIMEOUT
    - LP: #1454699
  * usb: core: hub: use new USB_RESUME_TIMEOUT
    - LP: #1454699
  * clk: at91: usb: propagate rate modification to the parent clk
    - LP: #1454699
  * ALSA: hda - Add dock support for ThinkPad X250 (17aa:2226)
    - LP: #1454699
  * ALSA: emu10k1: don't deadlock in proc-functions
    - LP: #1454699
  * ALSA: hda/realtek - Enable the ALC292 dock fixup on the Thinkpad T450
    - LP: #1454699
  * ALSA: hda - fix "num_steps = 0" error on ALC256
    - LP: #1446517, #1454699
  * ALSA: hda/realtek - Fix Headphone Mic doesn't recording for ALC256
    - LP: #1454699
  * Input: elantech - fix absolute mode setting on some ASUS laptops
    - LP: #1454699
  * mfd: core: Fix platform-device name collisions
    - LP: #1454699
  * fs/binfmt_elf.c: fix bug in loading of PIE binaries
    - LP: #1454699
  * ptrace: fix race between ptrace_resume() and wait_task_stopped()
    - LP: #1454699
  * NFC: st21nfcb: Retry i2c_master_send if it returns a negative value
    - LP: #1454699
  * rtlwifi: rtl8192cu: Add new USB ID
    - LP: #1454699
  * rtlwifi: rtl8192cu: Add new device ID
    - LP: #1454699
  * ext4: make fsync to sync parent dir in no-journal for real this time
    - LP: #1454699
  * mnt: Improve the umount_tree flags
    - LP: #1454699
  * mnt: Don't propagate umounts in __detach_mounts
    - LP: #1454699
  * perf symbols: Define STT_GNU_IFUNC for glibc 2.9 and older.
    - LP: #1454699
  * perf tools: Fix perf-read-vdsox32 not building and lib64 install dir
    - LP: #1454699
  * perf tools: Work around lack of sched_getcpu in glibc < 2.6.
    - LP: #1454699
  * tools lib traceevent kbuffer: Remove extra update to data pointer in
    PADDING
    - LP: #1454699
  * tools/power turbostat: Use $(CURDIR) instead of $(PWD) and add support
    for O= option in Makefile
    - LP: #1454699
  * UBI: account for bitflips in both the VID header and data
    - LP: #1454699
  * UBI: fix out of bounds write
    - LP: #1454699
  * UBI: initialize LEB number variable
    - LP: #1454699
  * UBI: fix check for "too many bytes"
    - LP: #1454699
  * scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
    - LP: #1454699
  * target: Fix COMPARE_AND_WRITE with SG_TO_MEM_NOALLOC handling
    - LP: #1454699
  * target/file: Fix BUG() when CONFIG_DEBUG_SG=y and DIF protection
    enabled
    - LP: #1454699
  * target/file: Fix UNMAP with DIF protection support
    - LP: #1454699
  * target/file: Fix SG table for prot_buf initialization
    - LP: #1454699
  * iser-target: Fix session hang in case of an rdma read DIF error
    - LP: #1454699
  * iser-target: Fix possible deadlock in RDMA_CM connection error
    - LP: #1454699
  * Bluetooth: ath3k: Add support Atheros AR5B195 combo Mini PCIe card
    - LP: #1454699
  * arm64: fix midr range for Cortex-A57 erratum 832075
    - LP: #1454699
  * arm64: head.S: ensure visibility of page tables
    - LP: #1454699
  * arm64: apply alternatives for !SMP kernels
    - LP: #1454699
  * arm64: errata: add workaround for cortex-a53 erratum #845719
    - LP: #1454699
  * powerpc/powernv: Don't map M64 segments using M32DT
    - LP: #1454699
  * powerpc: Fix missing L2 cache size in /sys/devices/system/cpu
    - LP: #1454699
  * powerpc/cell: Fix crash in iic_setup_cpu() after per_cpu changes
    - LP: #1454699
  * powerpc/cell: Fix cell iommu after it_page_shift changes
    - LP: #1454699
  * ASoC: cs4271: Increase delay time after reset
    - LP: #1454699
  * ASoC: wm8741: Fix rates constraints values
    - LP: #1454699
  * ASoC: davinci-evm: drop un-necessary remove function
    - LP: #1454699
  * ASoC: pcm512x: Add 'Analogue' prefix to analogue volume controls
    - LP: #1454699
  * ACPICA: Utilities: split IO address types from data type models.
    - LP: #1454699
  * ACPICA: Tables: Don't release ACPI_MTX_TABLES in
    acpi_tb_install_standard_table().
    - LP: #1454699
  * ACPI / scan: Annotate physical_node_lock in acpi_scan_is_offline()
    - LP: #1454699
  * xtensa: xtfpga: fix hardware lockup caused by LCD driver
    - LP: #1454699
  * xtensa: provide __NR_sync_file_range2 instead of __NR_sync_file_range
    - LP: #1454699
  * xtensa: ISS: fix locking in TAP network adapter
    - LP: #1454699
  * gpio: mvebu: Fix mask/unmask managment per irq chip type
    - LP: #1454699
  * clk: samsung: exynos4: Disable ARMCLK down feature on Exynos4210 SoC
    - LP: #1454699
  * clk: tegra: Register the proper number of resets
    - LP: #1454699
  * clk: qcom: Fix i2c frequency table
    - LP: #1454699
  * clk: qcom: fix RCG M/N counter configuration
    - LP: #1454699
  * dm crypt: fix deadlock when async crypto algorithm returns -EBUSY
    - LP: #1454699
  * sd: Unregister integrity profile
    - LP: #1454699
  * sd: Fix missing ATO tag check
    - LP: #1454699
  * Drivers: hv: vmbus: Fix a bug in the error path in vmbus_open()
    - LP: #1454699
  * mvsas: fix panic on expander attached SATA devices
    - LP: #1454699
  * rc: img-ir: fix error in parameters passed to irq_free()
    - LP: #1454699
  * stk1160: Make sure current buffer is released
    - LP: #1454699
  * IB/core: disallow registering 0-sized memory region
    - LP: #1454699
  * IB/core: don't disallow registering region starting at 0x0
    - LP: #1454699
  * IB/mlx4: Fix WQE LSO segment calculation
    - LP: #1454699
  * IB/iser: Fix wrong calculation of protection buffer length
    - LP: #1454699
  * tracing: Handle ftrace_dump() atomic context in graph_trace_open()
    - LP: #1454699
  * tracing: Fix incorrect enabling of trace events by boot cmdline
    - LP: #1454699
  * i2c: mux: use proper dev when removing "channel-X" symlinks
    - LP: #1454699
  * i2c: rk3x: report number of messages transmitted
    - LP: #1454699
  * i2c: core: Export bus recovery functions
    - LP: #1454699
  * drm/radeon: fix doublescan modes (v2)
    - LP: #1454699
  * drm/i915: Dont enable CS_PARSER_ERROR interrupts at all
    - LP: #1454699
  * drm: adv7511: Fix DDC error interrupt handling
    - LP: #1454699
  * drm: adv7511: Fix nested sleep when reading EDID
    - LP: #1454699
  * drm/i915: vlv: fix save/restore of GFX_MAX_REQ_COUNT reg
    - LP: #1454699
  * drm/i915: cope with large i2c transfers
    - LP: #1454699
  * RCU pathwalk breakage when running into a symlink overmounting
    something
    - LP: #1454699
  * nfsd4: disallow ALLOCATE with special stateids
    - LP: #1454699
  * nfsd4: fix READ permission checking
    - LP: #1454699
  * nfsd4: disallow SEEK with special stateids
    - LP: #1454699
  * nfsd: eliminate NFSD_DEBUG
    - LP: #1454699
  * NFS: Add a stub for GETDEVICELIST
    - LP: #1454699
  * e1000: add dummy allocator to fix race condition between mtu change and
    netpoll
    - LP: #1454699
  * mac80211: send AP probe as unicast again
    - LP: #1454699
  * ebpf: verifier: check that call reg with ARG_ANYTHING is initialized
    - LP: #1454699
  * lib: memzero_explicit: use barrier instead of OPTIMIZER_HIDE_VAR
    - LP: #1454699
  * wl18xx: show rx_frames_per_rates as an array as it really is
    - LP: #1454699
  * crypto: omap-aes - Fix support for unequal lengths
    - LP: #1454699
  * C6x: time: Ensure consistency in __init
    - LP: #1454699
  * memstick: mspro_block: add missing curly braces
    - LP: #1454699
  * drivers: platform: parse IRQ flags from resources
    - LP: #1454699
  * driver core: bus: Goto appropriate labels on failure in bus_add_device
    - LP: #1454699
  * netfilter: bridge: really save frag_max_size between PRE and
    POST_ROUTING
    - LP: #1454699
  * Linux 3.19.7
    - LP: #1454699
  * bpf: fix 64-bit divide
    - LP: #1454702
  * route: Use ipv4_mtu instead of raw rt_pmtu
    - LP: #1454702
  * mlx4: Fix tx ring affinity_mask creation
    - LP: #1454702
  * cxgb4: Fix MC1 memory offset calculation
    - LP: #1454702
  * net/mlx4_en: Schedule napi when RX buffers allocation fails
    - LP: #1454702
  * ipv4: Missing sk_nulls_node_init() in ping_unhash().
    - LP: #1454702
  * clk: at91: usb: fix determine_rate prototype
    - LP: #1454702
  * Linux 3.19.8
    - LP: #1454702
  * mmc: card: Don't access RPMB partitions for normal read/write
    - LP: #1454013
  * (upstream) gpio: dwapb: re-enable GPIO_DWAPB for arm64
    - LP: #1455105
  * iwlwifi: mvm: fix BT coex shared antenna activity check
    - LP: #1442411
  * ext4: allocate entire range in zero range
    - LP: #1425270
    - CVE-2015-0275
  * kernel.h: implement DIV_ROUND_CLOSEST_ULL
    - LP: #1456123
  * drm: fix drm_mode_getconnector() locking imbalance regression
    - LP: #1456123
  * drm/i915/skl: Fix WaDisableChickenBitTSGBarrierAckForFFSliceCS
    - LP: #1456123
  * vhost/scsi: potential memory corruption
    - LP: #1457807
    - CVE-2015-4036

  [ Ville Syrjälä ]

  * SAUCE: i915_bpo: drm/i915: Implement chv display PHY lane stagger setup
    - LP: #1456123
  * SAUCE: i915_bpo: drm/i915: Work around DISPLAY_PHY_CONTROL register
    corruption on CHV
    - LP: #1456123
  * SAUCE: i915_bpo: Revert "drm/i915: Hack to tie both common lanes
    together on chv"
    - LP: #1456123

 -- Luis Henriques <luis.henriques@xxxxxxxxxxxxx>  Fri, 29 May 2015
09:41:30 +0100

** Changed in: linux (Ubuntu Vivid)
       Status: Fix Committed => Fix Released

** Changed in: linux (Ubuntu Utopic)
       Status: Fix Committed => Fix Released

-- 
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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1457781

Title:
  armhf: cpufreq doesn't autoload by default

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Utopic:
  Fix Released
Status in linux source package in Vivid:
  Fix Released

Bug description:
  SRU Justification:

      Impact: upon boot, frequency scaling is not working.

      Fix: Apply the patches, recompile and reboot.

      Testcase: Try booting a beaglebone with and without a patched
  kernel.

  With this series applied there should be:

  ubuntu@beaglebone:~$ ls -la /sys/devices/system/cpu/cpu0/cpufreq/
  total 0
  drwxr-xr-x 3 root root    0 May 22 07:03 .
  drwxr-xr-x 5 root root    0 May 22 07:03 ..
  -r--r--r-- 1 root root 4096 May 22 07:03 affected_cpus
  -r-------- 1 root root 4096 May 22 07:03 cpuinfo_cur_freq
  -r--r--r-- 1 root root 4096 May 22 07:03 cpuinfo_max_freq
  -r--r--r-- 1 root root 4096 May 22 07:03 cpuinfo_min_freq
  -r--r--r-- 1 root root 4096 May 22 07:03 cpuinfo_transition_latency
  -r--r--r-- 1 root root 4096 May 22 07:03 related_cpus
  -r--r--r-- 1 root root 4096 May 22 07:03 scaling_available_frequencies
  -r--r--r-- 1 root root 4096 May 22 07:03 scaling_available_governors
  -r--r--r-- 1 root root 4096 May 22 07:03 scaling_cur_freq
  -r--r--r-- 1 root root 4096 May 22 07:03 scaling_driver
  -rw-r--r-- 1 root root 4096 May 22 04:43 scaling_governor
  -rw-r--r-- 1 root root 4096 May 22 07:03 scaling_max_freq
  -rw-r--r-- 1 root root 4096 May 22 07:03 scaling_min_freq
  -rw-r--r-- 1 root root 4096 May 22 07:03 scaling_setspeed
  drwxr-xr-x 2 root root    0 May 22 07:03 stats
  ubuntu@beaglebone:~$

  With an unpatched kernel, until the cpufreq module is loaded, that
  directory doesn't exist.

  ...

  While cpufreq support on armhf is available for a while, if support is
  compiled as a kernel module, the corresponding module doesn't autoload
  by default, and thus frequency scaling is not active upon boot until a
  user manually load it (or until /etc/modules is modified to forcibly
  load it).

  While in Trusty cpufreq was built-in on armhf, starting with Utopic we
  made support available as a kernel module, making people think that
  cpufreq was either broken or missing in their new kernels.

  To fix it, revert back that decision and make cpufreq compiled-in
  again on armhf - it affects Utopic and Vivid kernels.

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