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[Marc Bailly-Bechet <marc.baillybechet@xxxxxxxxx>]

Indeed I found that CTRL+ALT+F1 then ALT+F7 allowed me to come back to
my session, but with some features sometimes not working (http access
with firefox, task bar in kubuntu...).

I upgraded to Kubuntu 13.10 Beta 1 (this page:
http://www.kubuntu.org/news/kubuntu-1310-beta-1) at the beginning of the
week. From that moment I had no more trouble with this issue --
hopefully it won't come back.

Maybe upgrade?

Marc

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https://bugs.launchpad.net/bugs/1159232

Title:
  Running iwconfig crashes (freezes) MacBookAir3,1 requiring hard reboot

Status in Mactel Support:
  New
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Running iwconfig in a terminal freezes X on my MacBookAir3,1 requiring
  a hard reboot. Screen is totally frozen and accepts no keyboard or
  mouse input. Unable to Ctrl-Alt-F1 to console.

  Mar 23 16:48:09 medic kernel: [ 1022.517346] general protection fault: 0000 [#1] SMP 
  Mar 23 16:48:09 medic kernel: [ 1022.517354] Modules linked in: nvidia(POF) snd_hda_codec_hdmi snd_hda_codec_cirrus coretemp kvm_intel kvm ip6t_REJECT(F) xt_hl(F) ip6t_rt(F) nf_conntrack_ipv6(F) nf_defrag_ipv6(F) joydev(F) ipt_REJECT(F) xt_comment(F) xt_LOG(F) xt_limit(F) xt_tcpudp(F) xt_addrtype(F) snd_hda_intel nf_conntrack_ipv4(F) nf_defrag_ipv4(F) snd_hda_codec snd_hwdep(F) xt_state(F) lib80211_crypt_tkip snd_pcm(F) ip6table_filter(F) ip6_tables(F) nf_conntrack_netbios_ns(F) nf_conntrack_broadcast(F) nf_nat_ftp(F) applesmc nf_nat(F) nf_conntrack_ftp(F) nf_conntrack(F) iptable_filter(F) input_polldev ip_tables(F) uvcvideo x_tables(F) videobuf2_vmalloc snd_page_alloc(F) videobuf2_memops videobuf2_core snd_seq_midi(F) microcode(F) snd_seq_midi_event(F) videodev snd_rawmidi(F) wl(POF) bcm5974 btusb lib80211 snd_seq(F) rfcomm parport_pc(F) bnep ppdev(F) snd_seq_device(F) cfg80211 bluetooth shpchp snd_timer(F) apple_bl mac_hid snd(F) soundcore(F) binfmt_misc(F) lp(F) parport(F) ext2(F) xts(F) gf128mul(F) hid_gene
  Mar 23 16:48:09 medic kernel: ric dm_crypt(F) hid_apple usbhid hid video(F)
  Mar 23 16:48:09 medic kernel: [ 1022.517434] CPU 1 
  Mar 23 16:48:09 medic kernel: [ 1022.517439] Pid: 5678, comm: iwconfig Tainted: PF          O 3.8.0-13-generic #23-Ubuntu Apple Inc. MacBookAir3,1/Mac-942452F5819B1C1B
  Mar 23 16:48:09 medic kernel: [ 1022.517443] RIP: 0010:[<ffffffff8169abd1>]  [<ffffffff8169abd1>] wireless_process_ioctl+0x91/0x1b0
  Mar 23 16:48:09 medic kernel: [ 1022.517454] RSP: 0018:ffff880094af7d80  EFLAGS: 00010206
  Mar 23 16:48:09 medic kernel: [ 1022.517457] RAX: ffff88013462d000 RBX: 0000000000008b09 RCX: 01c623e401c623e4
  Mar 23 16:48:09 medic kernel: [ 1022.517459] RDX: 01c623e401c623e4 RSI: ffff880094af7e20 RDI: ffff88013462d000
  Mar 23 16:48:09 medic kernel: [ 1022.517462] RBP: ffff880094af7da8 R08: 0000000000000000 R09: ffffffff8169c3a0
  Mar 23 16:48:09 medic kernel: [ 1022.517465] R10: 0000000000000001 R11: 0000000000000246 R12: ffffffff8169c3a0
  Mar 23 16:48:09 medic kernel: [ 1022.517467] R13: ffffffff8169b710 R14: ffff880094af7dbc R15: ffff880094af7e20
  Mar 23 16:48:09 medic kernel: [ 1022.517470] FS:  00007fb0add82740(0000) GS:ffff88013fd00000(0000) knlGS:0000000000000000
  Mar 23 16:48:09 medic kernel: [ 1022.517473] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  Mar 23 16:48:09 medic kernel: [ 1022.517476] CR2: 00007fb0ad975073 CR3: 000000007b4a5000 CR4: 00000000000407e0
  Mar 23 16:48:09 medic kernel: [ 1022.517478] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  Mar 23 16:48:09 medic kernel: [ 1022.517481] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
  Mar 23 16:48:09 medic kernel: [ 1022.517484] Process iwconfig (pid: 5678, threadinfo ffff880094af6000, task ffff8800a1732e80)
  Mar 23 16:48:09 medic kernel: [ 1022.517485] Stack:
  Mar 23 16:48:09 medic kernel: [ 1022.517487]  0000000000000000 0000000000008b09 ffff880094af7e20 ffffffff81cbb640
  Mar 23 16:48:09 medic kernel: [ 1022.517492]  00007fffed20ec00 ffff880094af7de8 ffffffff8169b8e4 00008b0994af7e40
  Mar 23 16:48:09 medic kernel: [ 1022.517497]  0000000000008b09 00007fffed20ec00 ffff880094af7e20 00000000ffffffe7
  Mar 23 16:48:09 medic kernel: [ 1022.517502] Call Trace:
  Mar 23 16:48:09 medic kernel: [ 1022.517508]  [<ffffffff8169b8e4>] wext_handle_ioctl+0x74/0xd0
  Mar 23 16:48:09 medic kernel: [ 1022.517514]  [<ffffffff815cb44e>] dev_ioctl+0xce/0x5a0
  Mar 23 16:48:09 medic kernel: [ 1022.517521]  [<ffffffff815b0202>] sock_ioctl+0xf2/0x2b0
  Mar 23 16:48:09 medic kernel: [ 1022.517526]  [<ffffffff811a5809>] do_vfs_ioctl+0x99/0x570
  Mar 23 16:48:09 medic kernel: [ 1022.517532]  [<ffffffff811f751e>] ? proc_reg_read+0x8e/0xc0
  Mar 23 16:48:09 medic kernel: [ 1022.517536]  [<ffffffff811a5d71>] sys_ioctl+0x91/0xb0
  Mar 23 16:48:09 medic kernel: [ 1022.517542]  [<ffffffff816ce6ce>] ? do_page_fault+0xe/0x10
  Mar 23 16:48:09 medic kernel: [ 1022.517547]  [<ffffffff816d2cdd>] system_call_fastpath+0x1a/0x1f
  Mar 23 16:48:09 medic kernel: [ 1022.517549] Code: 02 00 00 48 8b 90 70 01 00 00 48 85 c9 0f 84 80 00 00 00 48 8b 09 48 85 c9 74 78 48 85 d2 48 8b 89 90 03 00 00 0f 84 bf 00 00 00 <0f> b7 72 08 8d 8b 00 75 ff ff 39 f1 72 51 0f b7 72 0a 8d 8b 20 
  Mar 23 16:48:09 medic kernel: [ 1022.517594] RIP  [<ffffffff8169abd1>] wireless_process_ioctl+0x91/0x1b0
  Mar 23 16:48:09 medic kernel: [ 1022.517599]  RSP <ffff880094af7d80>
  Mar 23 16:48:09 medic kernel: [ 1022.517603] ---[ end trace e8fa2cf87f23b10f ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: wireless-tools 30~pre9-8ubuntu1
  ProcVersionSignature: Ubuntu 3.8.0-13.23-generic 3.8.3
  Uname: Linux 3.8.0-13-generic x86_64
  NonfreeKernelModules: nvidia wl
  ApportVersion: 2.9.2-0ubuntu2
  Architecture: amd64
  Date: Sat Mar 23 16:53:15 2013
  InstallationDate: Installed on 2013-03-23 (0 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64+mac (20130320)
  MarkForUpload: True
  SourcePackage: wireless-tools
  UpgradeStatus: No upgrade log present (probably fresh install)
  --- 
  ApportVersion: 2.9.2-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  sciri      2394 F.... pulseaudio
  DistroRelease: Ubuntu 13.04
  HibernationDevice: RESUME=UUID=48d61547-b366-4cdb-a076-c62853f03e7c
  InstallationDate: Installed on 2013-03-23 (11 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64+mac (20130320)
  MachineType: Apple Inc. MacBookAir3,1
  MarkForUpload: True
  NonfreeKernelModules: nvidia wl
  Package: linux (not installed)
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.8.0-15-generic root=/dev/mapper/ubuntu--vg-root ro
  ProcVersionSignature: Ubuntu 3.8.0-15.25-generic 3.8.4
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-15-generic N/A
   linux-backports-modules-3.8.0-15-generic  N/A
   linux-firmware                            1.104
  Tags:  raring
  Uname: Linux 3.8.0-15-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm lpadmin sambashare sudo
  dmi.bios.date: 01/24/12
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBA31.88Z.0061.B07.1201241641
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-942452F5819B1C1B
  dmi.board.vendor: Apple Inc.
  dmi.board.version: 1.0
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-942452F5819B1C1B
  dmi.modalias: dmi:bvnAppleInc.:bvrMBA31.88Z.0061.B07.1201241641:bd01/24/12:svnAppleInc.:pnMacBookAir3,1:pvr1.0:rvnAppleInc.:rnMac-942452F5819B1C1B:rvr1.0:cvnAppleInc.:ct10:cvrMac-942452F5819B1C1B:
  dmi.product.name: MacBookAir3,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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