<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - WARN_ON(!(old->frontbuffer_bits & frontbuffer_bits))" href="https://bugs.freedesktop.org/show_bug.cgi?id=91866#c1">Comment # 1</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - WARN_ON(!(old->frontbuffer_bits & frontbuffer_bits))" href="https://bugs.freedesktop.org/show_bug.cgi?id=91866">bug 91866</a> from <a class="email" href="mailto:mirq-boogs@rere.qmqm.pl" title="Michał Mirosław <mirq-boogs@rere.qmqm.pl>"> Michał Mirosław</a> <pre>I just got similar WARN_ON during heavy swapping episode (around the time I hit Ctrl+Alt+F1 to switch from X to console). (On vanilla kernel 4.2.1) [98431.231948] ------------[ cut here ]------------ [98431.231973] WARNING: CPU: 6 PID: 2682 at /mnt/src-tmp/jaja/git/qmqm/drivers/gpu/drm/i915/i915_gem.c:5269 i915_gem_track_fb+0x61/0xfd [i915]() [98431.231975] WARN_ON(!(old->frontbuffer_bits & frontbuffer_bits)) [98431.232006] Modules linked in: tun ipt_MASQUERADE nf_nat_masquerade_ipv4 xt_REDIRECT nf_nat_redirect iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ip_tables x_tables ext3 jbd reiserfs rfcomm bnep snd_emu10k1_synth snd_emux_synth snd_seq_midi_emul snd_seq_virmidi snd_hrtimer snd_seq_midi snd_seq_midi_event snd_seq binfmt_misc cfg80211 cpufreq_powersave cpufreq_userspace cpufreq_stats cpufreq_conservative nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace sunrpc deflate twofish_generic twofish_avx_x86_64 twofish_x86_64_3way twofish_x86_64 twofish_common camellia_generic camellia_aesni_avx_x86_64 camellia_x86_64 serpent_avx_x86_64 serpent_sse2_x86_64 serpent_generic blowfish_generic blowfish_x86_64 blowfish_common cast5_avx_x86_64 cast5_generic cast_common des_generic [98431.232044] cmac xcbc rmd160 sha512_ssse3 sha512_generic mcryptd sha1_ssse3 sha1_generic af_key xfrm_algo xfs libcrc32c ext2 btusb btrtl btbcm btintel bluetooth snd_hda_codec_hdmi snd_emu10k1 snd_hda_codec_realtek snd_hda_codec_generic snd_util_mem intel_rapl snd_ac97_codec snd_hda_intel snd_hda_codec ac97_bus i915 snd_hda_core iosf_mbi snd_rawmidi snd_hwdep snd_seq_device intel_powerclamp snd_pcm_oss snd_mixer_oss snd_pcm i2c_algo_bit kvm_intel snd_timer drm_kms_helper emu10k1_gp snd drm kvm gameport soundcore i2c_i801 i2c_core pcspkr video loop firewire_sbp2 fuse ecryptfs autofs4 algif_skcipher af_alg microcode raid456 async_raid6_recov async_memcpy async_pq raid6_pq async_xor xor async_tx crc32c_intel ghash_clmulni_intel sg firewire_ohci firewire_core crc_itu_t xhci_pci xhci_hcd e1000e [98431.232047] CPU: 6 PID: 2682 Comm: Xorg Not tainted 4.2.1mq #151 [98431.232049] Hardware name: System manufacturer System Product Name/P8Z68-V PRO, BIOS 3603 11/09/2012 [98431.232052] 0000000000000000 0000000000000009 ffffffff8149cbd2 ffff880402dab8b8 [98431.232054] ffffffff810610c4 ffff88040c500000 ffffffffa02cdd7e 0000000000000006 [98431.232056] 0000000000000010 ffff88040c500000 ffff8803fe48c240 ffff8803fe48c240 [98431.232057] Call Trace: [98431.232063] [<ffffffff8149cbd2>] ? dump_stack+0x4a/0x74 [98431.232066] [<ffffffff810610c4>] ? warn_slowpath_common+0x98/0xb0 [98431.232082] [<ffffffffa02cdd7e>] ? i915_gem_track_fb+0x61/0xfd [i915] [98431.232085] [<ffffffff81061121>] ? warn_slowpath_fmt+0x45/0x4a [98431.232100] [<ffffffffa02cdd7e>] ? i915_gem_track_fb+0x61/0xfd [i915] [98431.232122] [<ffffffffa0303669>] ? intel_prepare_plane_fb+0xdb/0x128 [i915] [98431.232138] [<ffffffffa01dd78f>] ? drm_atomic_helper_prepare_planes+0x4a/0xa3 [drm_kms_helper] [98431.232159] [<ffffffffa02fd1b7>] ? __intel_set_mode+0x2f8/0x8e7 [i915] [98431.232179] [<ffffffffa0303293>] ? intel_crtc_set_config+0x3e7/0x4a4 [i915] [98431.232191] [<ffffffffa055498f>] ? drm_mode_set_config_internal+0x50/0xd7 [drm] [98431.232195] [<ffffffffa01dff96>] ? restore_fbdev_mode+0xb0/0xc7 [drm_kms_helper] [98431.232199] [<ffffffffa01e1811>] ? drm_fb_helper_restore_fbdev_mode_unlocked+0x1e/0x54 [drm_kms_helper] [98431.232203] [<ffffffffa01e1875>] ? drm_fb_helper_set_par+0x2e/0x32 [drm_kms_helper] [98431.232223] [<ffffffffa030edf7>] ? intel_fbdev_set_par+0x11/0x55 [i915] [98431.232226] [<ffffffff81299178>] ? fb_set_var+0xa4/0x345 [98431.232228] [<ffffffff81299338>] ? fb_set_var+0x264/0x345 [98431.232231] [<ffffffff8122f084>] ? blk_peek_request+0xb4/0x212 [98431.232234] [<ffffffff81326dd4>] ? scsi_request_fn+0x23/0x2a9 [98431.232238] [<ffffffff81086738>] ? update_entity_load_avg+0x1f2/0x36e [98431.232241] [<ffffffff81291a0f>] ? fbcon_blank+0x75/0x1cb [98431.232244] [<ffffffff8107fb2b>] ? preempt_count_add+0x6e/0x80 [98431.232248] [<ffffffff812ecb1d>] ? do_unblank_screen+0xcd/0x13b [98431.232251] [<ffffffff812e4c51>] ? complete_change_console+0x4c/0xb7 [98431.232254] [<ffffffff812e5b46>] ? vt_ioctl+0xe8a/0x10ff [98431.232264] [<ffffffffa054fb2f>] ? drm_dropmaster_ioctl+0x66/0x70 [drm] [98431.232271] [<ffffffffa054c554>] ? drm_ioctl+0x2a4/0x3ae [drm] [98431.232275] [<ffffffff812dc095>] ? tty_ioctl+0x9fa/0xa5b [98431.232278] [<ffffffff811644c6>] ? do_vfs_ioctl+0x374/0x42c [98431.232281] [<ffffffff811645cf>] ? SyS_ioctl+0x51/0x77 [98431.232285] [<ffffffff814a0fdb>] ? entry_SYSCALL_64_fastpath+0x16/0x6e [98431.232287] ---[ end trace 70532bb1996c710a ]---</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>