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[Launchpad Bug Tracker <1457781@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 3.16.0-39.53

---------------
linux (3.16.0-39.53) utopic; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1458778

  [ Brad Figg ]

  * hyper-v -- add hid and fb drivers to linux-virtual
    - LP: #1444179

  [ Chris J Arges ]

  * [Config] CONFIG_VIRT_CPU_ACCOUNTING_NATIVE=y on ppc64el
    - LP: #1450497

  [ Luis Henriques ]

  * SAUCE: (no-up) trace: fix trace_open_exec() invocation
    - LP: #1453848

  [ Paolo Pisati ]

  * [Config] armhf: GENERIC_CPUFREQ_CPU0=y
    - LP: #1457781

  [ Upstream Kernel Changes ]

  * DT doc: net: cpsw mac-address is optional
    - LP: #1452628
  * net: cpsw: Add missing return value
    - LP: #1452628
  * net: cpsw: header, Add missing include
    - LP: #1452628
  * net: cpsw: Replace pr_err by dev_err
    - LP: #1452628
  * net: cpsw: Add am33xx MACID readout
    - LP: #1452628
  * am33xx: define syscon control module device node
    - LP: #1452628
  * arm: dts: am33xx, Add syscon phandle to cpsw node
    - LP: #1452628
  * x86: kvm: Revert "remove sched notifier for cross-cpu migrations"
    - LP: #1450584
  * x86: vdso: fix pvclock races with task migration
    - LP: #1450584
  * n_tty: Fix read buffer overwrite when no newline
    - LP: #1454202
  * spi: spidev: fix possible arithmetic overflow for multi-transfer
    message
    - LP: #1454202
  * arm64: vdso: fix build error when switching from LE to BE
    - LP: #1454202
  * uas: Do not blacklist ASM1153 disk enclosures
    - LP: #1454202
  * KVM: x86: Fix lost interrupt on irr_pending race
    - LP: #1454202
  * tcp: prevent fetching dst twice in early demux code
    - LP: #1454202
  * ipv6: protect skb->sk accesses from recursive dereference inside the
    stack
    - LP: #1454202
  * tcp: tcp_make_synack() should clear skb->tstamp
    - LP: #1454202
  * usbnet: Fix tx_packets stat for FLAG_MULTI_FRAME drivers
    - LP: #1454202
  * usbnet: Fix tx_bytes statistic running backward in cdc_ncm
    - LP: #1454202
  * bonding: Bonding Overriding Configuration logic restored.
    - LP: #1454202
  * HID: add ALWAYS_POLL quirk for a Logitech 0xc007
    - LP: #1454202
  * PCI/AER: Avoid info leak in __print_tlp_header()
    - LP: #1454202
  * PCI: cpcihp: Add missing curly braces in cpci_configure_slot()
    - LP: #1454202
  * sh_veu: v4l2_dev wasn't set
    - LP: #1454202
  * media: s5p-mfc: fix mmap support for 64bit arch
    - LP: #1454202
  * cpufreq: Schedule work for the first-online CPU on resume
    - LP: #1454202
  * cpuidle: remove state_count field from struct cpuidle_device
    - LP: #1454202
  * cpuidle: ACPI: do not overwrite name and description of C0
    - LP: #1454202
  * ioctx_alloc(): fix vma (and file) leak on failure
    - LP: #1454202
  * drm/i915/vlv: save/restore the power context base reg
    - LP: #1454202
  * drm/i915/chv: Remove Wait for a previous gfx force-off
    - LP: #1454202
  * drm/i915/vlv: remove wait for previous GFX clk disable request
    - LP: #1454202
  * ALSA: hda/realtek - Make more stable to get pin sense for ALC283
    - LP: #1454202
  * ALSA: bebob: fix to processing in big-endian machine for sending cue
    - LP: #1454202
  * be2iscsi: Fix kernel panic when device initialization fails
    - LP: #1454202
  * Defer processing of REQ_PREEMPT requests for blocked devices
    - LP: #1454202
  * ALSA: hda - Fix headphone pin config for Lifebook T731
    - LP: #1454202
  * ocfs2: _really_ sync the right range
    - LP: #1454202
  * ALSA: usb - Creative USB X-Fi Pro SB1095 volume knob support
    - LP: #1454202
  * iscsi target: fix oops when adding reject pdu
    - LP: #1454202
  * ext4: fix indirect punch hole corruption
    - LP: #1454202
  * ip_forward: Drop frames with attached skb->sk
    - LP: #1454202
  * net: add skb_checksum_complete_unset
    - LP: #1454202
  * ppp: call skb_checksum_complete_unset in ppp_receive_frame
    - LP: #1454202
  * tcp: fix possible deadlock in tcp_send_fin()
    - LP: #1454202
  * tcp: avoid looping in tcp_send_fin()
    - LP: #1454202
  * net: do not deplete pfmemalloc reserve
    - LP: #1454202
  * net: fix crash in build_skb()
    - LP: #1454202
  * usb: serial: silence all non-critical read errors
    - LP: #1454202
  * usb: gadget: composite: enable BESL support
    - LP: #1454202
  * rtlwifi: rtl8192cu: Add new device ID
    - LP: #1454202
  * rtlwifi: rtl8192cu: Add new USB ID
    - LP: #1454202
  * Bluetooth: ath3k: Add support Atheros AR5B195 combo Mini PCIe card
    - LP: #1454202
  * power_supply: twl4030_madc: Check return value of power_supply_register
    - LP: #1454202
  * power_supply: lp8788-charger: Fix leaked power supply on probe fail
    - LP: #1454202
  * ARM: dts: dove: Fix uart[23] reg property
    - LP: #1454202
  * xtensa: xtfpga: fix hardware lockup caused by LCD driver
    - LP: #1454202
  * Drivers: hv: vmbus: Fix a bug in the error path in vmbus_open()
    - LP: #1454202
  * xtensa: provide __NR_sync_file_range2 instead of __NR_sync_file_range
    - LP: #1454202
  * KVM: s390: Zero out current VMDB of STSI before including level3 data.
    - LP: #1454202
  * KVM: s390: fix handling of write errors in the tpi handler
    - LP: #1454202
  * KVM: s390: reinjection of irqs can fail in the tpi handler
    - LP: #1454202
  * usb: musb: core: fix TX/RX endpoint order
    - LP: #1454202
  * usb: gadget: printer: enqueue printer's response for setup request
    - LP: #1454202
  * compal-laptop: correct invalid hwmon name
    - LP: #1454202
  * compal-laptop: Fix leaking hwmon device
    - LP: #1454202
  * compal-laptop: Check return value of power_supply_register
    - LP: #1454202
  * sched/idle/x86: Restore mwait_idle() to fix boot hangs, to improve
    power savings and to improve performance
    - LP: #1454202
  * drm/radeon: fix doublescan modes (v2)
    - LP: #1454202
  * usb: phy: Find the right match in devm_usb_phy_match
    - LP: #1454202
  * ASoC: pcm512x: Add 'Analogue' prefix to analogue volume controls
    - LP: #1454202
  * mmc: sunxi: Use devm_reset_control_get_optional() for reset control
    - LP: #1454202
  * tools lib traceevent kbuffer: Remove extra update to data pointer in
    PADDING
    - LP: #1454202
  * MIPS: Loongson-3: Add IRQF_NO_SUSPEND to Cascade irqaction
    - LP: #1454202
  * ring-buffer: Replace this_cpu_*() with __this_cpu_*()
    - LP: #1454202
  * HID: add HP OEM mouse to quirk ALWAYS_POLL
    - LP: #1454202
  * HID: add quirk for PIXART OEM mouse used by HP
    - LP: #1454202
  * ASoC: wm8741: Fix rates constraints values
    - LP: #1454202
  * cdc-wdm: fix endianness bug in debug statements
    - LP: #1454202
  * staging: panel: fix lcd type
    - LP: #1454202
  * UBI: account for bitflips in both the VID header and data
    - LP: #1454202
  * UBI: fix out of bounds write
    - LP: #1454202
  * UBI: initialize LEB number variable
    - LP: #1454202
  * UBI: fix check for "too many bytes"
    - LP: #1454202
  * ARM: S3C64XX: Use fixed IRQ bases to avoid conflicts on Cragganmore
    - LP: #1454202
  * ASoC: davinci-evm: drop un-necessary remove function
    - LP: #1454202
  * iscsi-target: Convert iscsi_thread_set usage to kthread.h
    - LP: #1454202
  * Drivers: hv: vmbus: Don't wait after requesting offers
    - LP: #1454202
  * Btrfs: fix log tree corruption when fs mounted with -o discard
    - LP: #1454202
  * btrfs: don't accept bare namespace as a valid xattr
    - LP: #1454202
  * MIPS: KVM: Handle MSA Disabled exceptions from guest
    - LP: #1454202
  * ARM: 8320/1: fix integer overflow in ELF_ET_DYN_BASE
    - LP: #1454202
  * MIPS: Hibernate: flush TLB entries earlier
    - LP: #1454202
  * ASoC: cs4271: Increase delay time after reset
    - LP: #1454202
  * stk1160: Make sure current buffer is released
    - LP: #1454202
  * mnt: Improve the umount_tree flags
    - LP: #1454202
  * ext4: make fsync to sync parent dir in no-journal for real this time
    - LP: #1454202
  * Input: elantech - fix absolute mode setting on some ASUS laptops
    - LP: #1454202
  * usb: define a generic USB_RESUME_TIMEOUT macro
    - LP: #1454202
  * usb: host: xhci: use new USB_RESUME_TIMEOUT
    - LP: #1454202
  * usb: host: ehci: use new USB_RESUME_TIMEOUT
    - LP: #1454202
  * usb: host: uhci: use new USB_RESUME_TIMEOUT
    - LP: #1454202
  * usb: musb: use new USB_RESUME_TIMEOUT
    - LP: #1454202
  * usb: host: isp116x: use new USB_RESUME_TIMEOUT
    - LP: #1454202
  * usb: host: fotg210: use new USB_RESUME_TIMEOUT
    - LP: #1454202
  * usb: host: fusbh200: use new USB_RESUME_TIMEOUT
    - LP: #1454202
  * usb: host: oxu210hp: use new USB_RESUME_TIMEOUT
    - LP: #1454202
  * usb: host: r8a66597: use new USB_RESUME_TIMEOUT
    - LP: #1454202
  * usb: host: sl811: use new USB_RESUME_TIMEOUT
    - LP: #1454202
  * usb: dwc2: hcd: use new USB_RESUME_TIMEOUT
    - LP: #1454202
  * usb: isp1760: hcd: use new USB_RESUME_TIMEOUT
    - LP: #1454202
  * usb: core: hub: use new USB_RESUME_TIMEOUT
    - LP: #1454202
  * iser-target: Fix session hang in case of an rdma read DIF error
    - LP: #1454202
  * iser-target: Fix possible deadlock in RDMA_CM connection error
    - LP: #1454202
  * gpio: mvebu: Fix mask/unmask managment per irq chip type
    - LP: #1454202
  * rc: img-ir: fix error in parameters passed to irq_free()
    - LP: #1454202
  * scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
    - LP: #1454202
  * ALSA: emu10k1: don't deadlock in proc-functions
    - LP: #1454202
  * MIPS: asm: asm-eva: Introduce kernel load/store variants
    - LP: #1454202
  * MIPS: Malta: Detect and fix bad memsize values
    - LP: #1454202
  * clk: tegra: Register the proper number of resets
    - LP: #1454202
  * ALSA: hda - Add dock support for ThinkPad X250 (17aa:2226)
    - LP: #1454202
  * clk: at91: usb: fix at91sam9x5 recalc, round and set rate
    - LP: #1454202
  * xtensa: ISS: fix locking in TAP network adapter
    - LP: #1454202
  * nosave: consolidate __nosave_{begin,end} in <asm/sections.h>
    - LP: #1454202
  * s390/hibernate: fix save and restore of kernel text section
    - LP: #1454202
  * ALSA: hda/realtek - Enable the ALC292 dock fixup on the Thinkpad T450
    - LP: #1454202
  * Btrfs: fix inode eviction infinite loop after extent_same ioctl
    - LP: #1454202
  * Btrfs: fix inode eviction infinite loop after cloning into it
    - LP: #1454202
  * ACPICA: Tables: Don't release ACPI_MTX_TABLES in
    acpi_tb_install_standard_table().
    - LP: #1454202
  * drm/i915: Dont enable CS_PARSER_ERROR interrupts at all
    - LP: #1454202
  * KVM: x86: Fix MSR_IA32_BNDCFGS in msrs_to_save
    - LP: #1454202
  * target: Fix COMPARE_AND_WRITE with SG_TO_MEM_NOALLOC handling
    - LP: #1454202
  * mm/hugetlb: use pmd_page() in follow_huge_pmd()
    - LP: #1454202
  * fs/binfmt_elf.c: fix bug in loading of PIE binaries
    - LP: #1454202
  * IB/core: disallow registering 0-sized memory region
    - LP: #1454202
  * IB/core: don't disallow registering region starting at 0x0
    - LP: #1454202
  * target/file: Fix BUG() when CONFIG_DEBUG_SG=y and DIF protection
    enabled
    - LP: #1454202
  * target/file: Fix SG table for prot_buf initialization
    - LP: #1454202
  * target/file: Fix UNMAP with DIF protection support
    - LP: #1454202
  * ptrace: fix race between ptrace_resume() and wait_task_stopped()
    - LP: #1454202
  * mvsas: fix panic on expander attached SATA devices
    - LP: #1454202
  * nfsd: fix nsfd startup race triggering BUG_ON
    - LP: #1454202
  * i2c: rk3x: report number of messages transmitted
    - LP: #1454202
  * i2c: Mark adapter devices with pm_runtime_no_callbacks
    - LP: #1454202
  * nfs: fix high load average due to callback thread sleeping
    - LP: #1454202
  * drm/i915: cope with large i2c transfers
    - LP: #1454202
  * drm/i915: vlv: fix save/restore of GFX_MAX_REQ_COUNT reg
    - LP: #1454202
  * ACPI / scan: Annotate physical_node_lock in acpi_scan_is_offline()
    - LP: #1454202
  * RCU pathwalk breakage when running into a symlink overmounting
    something
    - LP: #1454202
  * drivers/of: Add empty ranges quirk for PA-Semi
    - LP: #1454202
  * e1000: add dummy allocator to fix race condition between mtu change and
    netpoll
    - LP: #1454202
  * wl18xx: show rx_frames_per_rates as an array as it really is
    - LP: #1454202
  * ARM: shmobile: r8a7790: Correct SYSCIER value
    - LP: #1454202
  * apple-gmux: lock iGP IO to protect from vgaarb changes
    - LP: #1454202
  * lib: memzero_explicit: use barrier instead of OPTIMIZER_HIDE_VAR
    - LP: #1454202
  * clk: qcom: fix RCG M/N counter configuration
    - LP: #1454202
  * arm64: head.S: ensure visibility of page tables
    - LP: #1454202
  * driver core: bus: Goto appropriate labels on failure in bus_add_device
    - LP: #1454202
  * C6x: time: Ensure consistency in __init
    - LP: #1454202
  * xprtrdma: Prevent infinite loop in rpcrdma_ep_create()
    - LP: #1454202
  * crypto: omap-aes - Fix support for unequal lengths
    - LP: #1454202
  * ARM: fix broken hibernation
    - LP: #1454202
  * jhash: Update jhash_[321]words functions to use correct initval
    - LP: #1454202
  * vti6: fix uninit when using x-netns
    - LP: #1454202
  * powerpc/cell: Fix cell iommu after it_page_shift changes
    - LP: #1454202
  * KVM: use slowpath for cross page cached accesses
    - LP: #1454202
  * powerpc: Fix missing L2 cache size in /sys/devices/system/cpu
    - LP: #1454202
  * i2c: core: Export bus recovery functions
    - LP: #1454202
  * IB/mlx4: Fix WQE LSO segment calculation
    - LP: #1454202
  * IB/iser: Fix wrong calculation of protection buffer length
    - LP: #1454202
  * mlx5: wrong page mask if CONFIG_ARCH_DMA_ADDR_T_64BIT enabled for 32Bit
    architectures
    - LP: #1454202
  * skbuff: Do not scrub skb mark within the same name space
    - LP: #1454202
  * firmware/ihex2fw.c: restore missing default in switch statement
    - LP: #1454202
  * memstick: mspro_block: add missing curly braces
    - LP: #1454202
  * tools/power turbostat: Use $(CURDIR) instead of $(PWD) and add support
    for O= option in Makefile
    - LP: #1454202
  * cpufreq: fix a NULL pointer dereference in __cpufreq_governor()
    - LP: #1454202
  * Input: twl4030-pwrbutton - ensure a wakeup event is recorded.
    - LP: #1454202
  * Input: elantech - fix crc_enabled for Fujitsu H730
    - LP: #1454202
  * Input: elantech - add more Fujtisu notebooks to force crc_enabled
    - LP: #1454202
  * ext4: fix accidental flag aliasing in ext4_map_blocks flags
    - LP: #1454202
  * ext4: fix ZERO_RANGE bug hidden by flag aliasing
    - LP: #1454202
  * ext4: allocate entire range in zero range
    - LP: #1454202
  * ipv4: Missing sk_nulls_node_init() in ping_unhash().
    - LP: #1454202
  * Linux 3.16.7-ckt11
    - LP: #1454202
  * mmc: card: Don't access RPMB partitions for normal read/write
    - LP: #1454013
  * HID: multitouch: add support of clickpads
    - LP: #1456881

 -- Luis Henriques <luis.henriques@xxxxxxxxxxxxx>  Tue, 26 May 2015
09:19:21 +0100

-- 
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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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