Description of problem: The PC had been idle for several hours and the screensaver was "frozen." Additional info: reporter: libreport-2.2.2 BUG: soft lockup - CPU#5 stuck for 23s! [kwin:5064] Modules linked in: rfcomm fuse md4 nls_utf8 cifs dns_resolver fscache nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_rpfilter ip6t_REJECT xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw bnep iTCO_wdt iTCO_vendor_support usblp dcdbas snd_usb_audio snd_usbmidi_lib snd_rawmidi snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm ath3k btusb arc4 bluetooth 6lowpan_iphc ath9k ath9k_common ath9k_hw ath mac80211 cfg80211 snd_timer snd rfkill mei_me soundcore lpc_ich shpchp mei serio_raw i2c_i801 mfd_core x86_pkg_temp_thermal coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel microcode nfsd auth_rpcgss nfs_acl lockd sunrpc usb_storage raid1 nouveau mxm_wmi wmi i2c_algo_bit drm_kms_helper ttm drm r8169 mii i2c_core video CPU: 5 PID: 5064 Comm: kwin Not tainted 3.14.4-200.fc20.x86_64 #1 Hardware name: Dell Inc. XPS 8500 /0NW73C, BIOS A09 09/05/2012 task: ffff8800d93e9300 ti: ffff8803983dc000 task.ti: ffff8803983dc000 RIP: 0010:[<ffffffff81369232>] [<ffffffff81369232>] ioread32+0x42/0x50 RSP: 0018:ffff8803983dda40 EFLAGS: 00000296 RAX: 000000000013c80c RBX: 0000000000000000 RCX: 0000000000000018 RDX: 000000000000c68f RSI: 0000000000000010 RDI: ffffc90005c40040 RBP: ffff8803983dda48 R08: ffff8800d7112800 R09: ffff88040e003b00 R10: ffffffffa0132bae R11: ffffffffa00b1564 R12: ffff8800df37c9c0 R13: ffff8803983dd9c8 R14: ffff880408156200 R15: 00000000d0198ac1 FS: 00007f02c2ecc700(0000) GS:ffff88041ed40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe8c716c140 CR3: 0000000001c0c000 CR4: 00000000001407e0 Stack: ffffffffa013601c ffff8803983dda58 ffffffffa013b8ee ffff8803983dda88 ffffffffa013224a ffff8803fd135c40 0000000000000000 0000000000000000 ffff8800d93e9300 ffff8803983ddae8 ffffffffa0132875 00000000983ddaf8 Call Trace: [<ffffffffa013601c>] ? nouveau_bo_rd32+0x2c/0x30 [nouveau] [<ffffffffa013b8ee>] nv84_fence_read+0x2e/0x30 [nouveau] [<ffffffffa013224a>] nouveau_fence_update+0x5a/0x80 [nouveau] [<ffffffffa0132875>] nouveau_fence_wait+0xc5/0x1b0 [nouveau] [<ffffffffa0130dfd>] nouveau_channel_idle+0x8d/0xb0 [nouveau] [<ffffffffa0130e62>] nouveau_channel_del+0x42/0x110 [nouveau] [<ffffffffa0139b7b>] nouveau_abi16_chan_fini.isra.2+0x10b/0x190 [nouveau] [<ffffffffa0139e2e>] nouveau_abi16_fini+0x3e/0x80 [nouveau] [<ffffffffa012fe1e>] nouveau_drm_preclose+0x3e/0x80 [nouveau] [<ffffffffa0036a51>] drm_release+0x71/0x570 [drm] [<ffffffff811eb3dc>] __fput+0xdc/0x230 [<ffffffff811eb57e>] ____fput+0xe/0x10 [<ffffffff810aaff4>] task_work_run+0xc4/0xe0 [<ffffffff8108c754>] do_exit+0x2c4/0xa30 [<ffffffff8108cf3f>] do_group_exit+0x3f/0xa0 [<ffffffff8109ceab>] get_signal_to_deliver+0x1cb/0x5d0 [<ffffffff81014477>] do_signal+0x57/0x640 [<ffffffff81014ad0>] do_notify_resume+0x70/0xa0 [<ffffffff816ff822>] int_signal+0x12/0x17 Code: 66 0f 1f 84 00 00 00 00 00 55 48 c7 c6 e5 d1 a4 81 48 89 e5 e8 f0 fe ff ff b8 ff ff ff ff 5d c3 66 0f 1f 84 00 00 00 00 00 8b 07 <c3> 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 48 81 fe ff ff 03 00
Created attachment 901074 [details] File: dmesg
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Fedora 20 changed to end-of-life (EOL) status on 2015-06-23. Fedora 20 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.