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[Launchpad Bug Tracker <1163720@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 3.5.0-45.68

---------------
linux (3.5.0-45.68) quantal; urgency=low

  [Steve Conklin]

  * Release Tracking Bug
    - LP: #1257035

  [ Kamal Mostafa ]

  * SAUCE: (no-up) drm/i915: i915.disable_pch_pwm overrides PCH_PWM_ENABLE
    quirk
    - LP: #1163720

  [ Upstream Kernel Changes ]

  * nfs: don't allow nfs_find_actor to match inodes of the wrong type
    - LP: #1257002
  * jfs: fix error path in ialloc
    - LP: #1257002
  * mac80211: drop spoofed packets in ad-hoc mode
    - LP: #1257002
  * mac80211: use sta_info_get_bss() for nl80211 tx and client probing
    - LP: #1257002
  * mac80211: update sta->last_rx on acked tx frames
    - LP: #1257002
  * iwlwifi: pcie: add SKUs for 6000, 6005 and 6235 series
    - LP: #1257002
  * libata: make ata_eh_qc_retry() bump scmd->allowed on bogus failures
    - LP: #1257002
  * mac80211: correctly close cancelled scans
    - LP: #1257002
  * rtlwifi: rtl8192cu: Fix error in pointer arithmetic
    - LP: #1257002
  * wireless: radiotap: fix parsing buffer overrun
    - LP: #1257002
  * drm/vmwgfx: Don't kill clients on VT switch
    - LP: #1257002
  * ecryptfs: Fix memory leakage in keystore.c
    - LP: #1257002
  * drm: Prevent overwriting from userspace underallocating core ioctl
    structs
    - LP: #1257002
  * drm: Pad drm_mode_get_connector to 64-bit boundary
    - LP: #1257002
  * drm/radeon/atom: workaround vbios bug in transmitter table on rs780
    - LP: #1257002
  * md: Fix skipping recovery for read-only arrays.
    - LP: #1257002
  * md: avoid deadlock when md_set_badblocks.
    - LP: #1257002
  * target/pscsi: fix return value check
    - LP: #1257002
  * parisc: Do not crash 64bit SMP kernels on machines with >= 4GB RAM
    - LP: #1257002
  * USB: serial: ftdi_sio: add id for Z3X Box device
    - LP: #1257002
  * clockevents: Sanitize ticks to nsec conversion
    - LP: #1257002
  * perf: Fix perf ring buffer memory ordering
    - LP: #1257002
  * xtensa: don't use alternate signal stack on threads
    - LP: #1257002
  * ASoC: dapm: Fix source list debugfs outputs
    - LP: #1257002
  * ASoC: wm_hubs: Add missing break in hp_supply_event()
    - LP: #1257002
  * uml: check length in exitcode_proc_write()
    - LP: #1257002
  * staging: ozwpan: prevent overflow in oz_cdev_write()
    - LP: #1257002
  * aacraid: missing capable() check in compat ioctl
    - LP: #1257002
  * staging: wlags49_h2: buffer overflow setting station name
    - LP: #1257002
  * Staging: bcm: info leak in ioctl
    - LP: #1257002
  * ALSA: fix oops in snd_pcm_info() caused by ASoC DPCM
    - LP: #1257002
  * lib/scatterlist.c: don't flush_kernel_dcache_page on slab page
    - LP: #1257002
  * scripts/kallsyms: filter symbols not in kernel address space
    - LP: #1257002
  * xen-netback: use jiffies_64 value to calculate credit timeout
    - LP: #1257002
  * net: flow_dissector: fail on evil iph->ihl
    - LP: #1257002
  * PCI/PM: Clear state_saved during suspend
    - LP: #1257002
  * ALSA: hda - Move one-time init codes from generic_hdmi_init()
    - LP: #1212160, #1257002
  * NFSv4: Fix a use-after-free situation in _nfs4_proc_getlk()
    - LP: #1257002
  * USB: mos7840: fix tiocmget error handling
    - LP: #1257002
  * usb: Disable USB 2.0 Link PM before device reset.
    - LP: #1257002
  * usb: hub: Clear Port Reset Change during init/resume
    - LP: #1257002
  * rt2400pci: fix RSSI read
    - LP: #1257002
  * rt2x00: check if device is still available on rt2x00mac_flush()
    - LP: #1257002
  * rt2800usb: slow down TX status polling
    - LP: #1257002
  * alarmtimer: return EINVAL instead of ENOTSUPP if rtcdev doesn't exist
    - LP: #1257002
  * ARM: OMAP2+: irq, AM33XX add missing register check
    - LP: #1257002
  * USB：add new zte 3g-dongle's pid to option.c
    - LP: #1257002
  * libata: Fix display of sata speed
    - LP: #1257002
  * ahci: disabled FBS prior to issuing software reset
    - LP: #1257002
  * drivers/libata: Set max sector to 65535 for Slimtype DVD A DS8A9SH
    drive
    - LP: #1257002
  * ALSA: 6fire: Fix probe of multiple cards
    - LP: #1257002
  * usb: wusbcore: set the RPIPE wMaxPacketSize value correctly
    - LP: #1257002
  * usb: wusbcore: change WA_SEGS_MAX to a legal value
    - LP: #1257002
  * powerpc/vio: use strcpy in modalias_show
    - LP: #1257002
  * can: c_can: Fix RX message handling, handle lost message before EOB
    - LP: #1257002
  * ASoC: ak4642: prevent un-necessary changes to SG_SL1
    - LP: #1257002
  * ahci: Add Device IDs for Intel Wildcat Point-LP
    - LP: #1257002
  * powerpc/powernv: Add PE to its own PELTV
    - LP: #1257002
  * perf/ftrace: Fix paranoid level for enabling function tracer
    - LP: #1257002
  * ALSA: hda - Add support for CX20952
    - LP: #1257002
  * qeth: avoid buffer overflow in snmp ioctl
    - LP: #1257002
  * cris: media platform drivers: fix build
    - LP: #1257002
  * mm: ensure get_unmapped_area() returns higher address than
    mmap_min_addr
    - LP: #1257002
  * vsprintf: check real user/group id for %pK
    - LP: #1257002
  * backlight: atmel-pwm-bl: fix reported brightness
    - LP: #1257002
  * backlight: atmel-pwm-bl: fix gpio polarity in remove
    - LP: #1257002
  * devpts: plug the memory leak in kill_sb
    - LP: #1257002
  * netfilter: nf_ct_sip: don't drop packets with offsets pointing outside
    the packet
    - LP: #1257002
  * tracing: Fix potential out-of-bounds in trace_get_user()
    - LP: #1257002
  * ARM: 7668/1: fix memset-related crashes caused by recent GCC (4.7.2)
    optimizations
    - LP: #1257002
  * ARM: 7670/1: fix the memset fix
    - LP: #1257002
  * usb: fix cleanup after failure in hub_configure()
    - LP: #1257002
  * include/linux/fs.h: disable preempt when acquire i_size_seqcount write
    lock
    - LP: #1257002
  * 8139cp: re-enable interrupts after tx timeout
    - LP: #1257002
  * SUNRPC handle EKEYEXPIRED in call_refreshresult
    - LP: #1257002
  * Fix a few incorrectly checked [io_]remap_pfn_range() calls
    - LP: #1257002
  * crypto: ansi_cprng - Fix off by one error in non-block size request
    - LP: #1257002
  * Linux 3.5.7.26
    - LP: #1257002
 -- Steve Conklin <sconklin@xxxxxxxxxxxxx>   Mon, 02 Dec 2013 13:52:30 -0600

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

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

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https://bugs.launchpad.net/bugs/1163720

Title:
  Brightness control broken on XPS13 and 3.8.0-16, 3.8.0-22 and
  3.11.0-12

Status in The Linux Kernel:
  Incomplete
Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Precise:
  Fix Released
Status in “linux” source package in Quantal:
  Fix Released
Status in “linux” source package in Raring:
  Fix Released
Status in “linux” source package in Saucy:
  Fix Released

Bug description:
  Since 3.8.0-16, the brightness control doesn’t work anymore.
  The popup is displayed, so the shortcut keys do work correctly, but it has no effect on the actual brightness of the screen.

  Switching back to 3.8.0-15 solves the issue.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-16-generic 3.8.0-16.26
  ProcVersionSignature: Ubuntu 3.8.0-16.26-generic 3.8.5
  Uname: Linux 3.8.0-16-generic x86_64
  ApportVersion: 2.9.2-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  coucouf    1837 F.... pulseaudio
  Date: Wed Apr  3 08:29:58 2013
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-precise-amd64-20120703-2
  HibernationDevice: RESUME=UUID=e49e9eae-f16f-45bb-ad2c-b6da5c0c6f6d
  InstallationDate: Installed on 2013-03-23 (10 days ago)
  InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20120703-15:08
  MachineType: Dell Inc. Dell System XPS L322X
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-16-generic root=UUID=3f6858e1-d8f5-44c4-b8e9-5ab8b9639ba7 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-16-generic N/A
   linux-backports-modules-3.8.0-16-generic  N/A
   linux-firmware                            1.104
  SourcePackage: linux
  UpgradeStatus: Upgraded to raring on 2013-04-02 (0 days ago)
  dmi.bios.date: 01/22/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A07
  dmi.board.name: 0PJHXN
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrA07:bd01/22/2013:svnDellInc.:pnDellSystemXPSL322X:pvr:rvnDellInc.:rn0PJHXN:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Dell System XPS L322X
  dmi.sys.vendor: Dell Inc.

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