Hello,
after installing the lated kernel I found the attached message repeated many times. I saw a thread on lkml dealing with this topic. At the moment I can't see any resulting problem. I hope there will be a fix quite soon.
Feb 13 13:52:18 note kernel: ------------[ cut here ]------------
Feb 13 13:52:18 note kernel: WARNING: CPU: 0 PID: 851 at /tmp/buildd/linux-siduction-3.19/drivers/gpu/drm/drm_irq.c:1121 drm_wait_one_vblank+0x3b/0x167 [drm]()
Feb 13 13:52:18 note kernel: vblank not available on crtc 0, ret=-22
Feb 13 13:52:18 note kernel: Modules linked in: uas usb_storage rfcomm ctr ccm af_packet pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) cpufreq_powersave cpufreq_stats cpufreq_conservative bnep nfsd auth_rpcgss nfs_acl nfs lockd grace fscache sunrpc joydev iTCO_wdt iTCO_vendor_support dell_wmi sparse_keymap dell_laptop dcdbas btusb bluetooth i8k coretemp kvm_intel arc4 kvm evdev psmouse pcspkr serio_raw i2c_i801 b43 i915 snd_hda_codec_idt i2c_algo_bit bcma snd_hda_codec_generic mac80211 yenta_socket pcmcia_rsrc drm_kms_helper lpc_ich snd_hda_intel cfg80211 snd_hda_controller rfkill ssb_hcd rng_core snd_hda_codec 8250_fintek drm wmi video snd_hwdep snd_pcm i2c_core ac snd_timer button snd intel_agp soundcore acpi_cpufreq battery intel_gtt processor loop fuse parport_pc ppdev lp parport autofs4 ext4 crc16
Feb 13 13:52:18 note kernel: jbd2 mbcache crc32c_generic btrfs xor raid6_pq xts gf128mul algif_skcipher af_alg hid_generic usbhid hid dm_crypt dm_mod md_mod sg sd_mod sr_mod cdrom ata_generic pata_acpi ahci firewire_ohci libahci ata_piix libata firewire_core crc_itu_t scsi_mod tg3 ptp pps_core ssb mmc_core pcmcia pcmcia_core thermal uhci_hcd ehci_pci ehci_hcd usbcore usb_common
Feb 13 13:52:18 note kernel: CPU: 0 PID: 851 Comm: systemd-logind Tainted: G W O 3.19-0.towo-siduction-amd64 #1
Feb 13 13:52:18 note kernel: Hardware name: Dell Inc. Latitude D830 /0HN341, BIOS A17 06/19/2013
Feb 13 13:52:18 note kernel: 0000000000000000 0000000000000009 ffffffff813c9d71 ffff880214eb79d8
Feb 13 13:52:18 note kernel: ffffffff810428d1 ffffffff81001786 ffffffffa04d4bdf ffff8800d68c97f0
Feb 13 13:52:18 note kernel: ffff8802151d0000 0000000000000000 0000000000006014 ffff880214cf1000
Feb 13 13:52:18 note kernel: Call Trace:
Feb 13 13:52:18 note kernel: [<ffffffff813c9d71>] ? dump_stack+0x4a/0x74
Feb 13 13:52:18 note kernel: [<ffffffff810428d1>] ? warn_slowpath_common+0x93/0xab
Feb 13 13:52:18 note kernel: [<ffffffff81001786>] ? __switch_to+0x296/0x4a3
Feb 13 13:52:18 note kernel: [<ffffffffa04d4bdf>] ? drm_wait_one_vblank+0x3b/0x167 [drm]
Feb 13 13:52:18 note kernel: [<ffffffff8104292e>] ? warn_slowpath_fmt+0x45/0x4a
Feb 13 13:52:18 note kernel: [<ffffffffa04d4bdf>] ? drm_wait_one_vblank+0x3b/0x167 [drm]
Feb 13 13:52:18 note kernel: [<ffffffff813cd7e5>] ? _raw_spin_lock_irqsave+0x18/0x57
Feb 13 13:52:18 note kernel: [<ffffffff8105ddef>] ? get_parent_ip+0x9/0x1b
Feb 13 13:52:18 note kernel: [<ffffffffa06118bd>] ? intel_enable_tv+0x1c/0x53 [i915]
Feb 13 13:52:18 note kernel: [<ffffffffa05e660d>] ? i9xx_crtc_enable+0x359/0x3bd [i915]
Feb 13 13:52:18 note kernel: [<ffffffffa05e5f60>] ? __intel_set_mode+0x85b/0x96a [i915]
Feb 13 13:52:18 note kernel: [<ffffffffa05ea6df>] ? intel_set_mode+0x65/0x86 [i915]
Feb 13 13:52:18 note kernel: [<ffffffffa05eaaa1>] ? intel_get_load_detect_pipe+0x3a1/0x416 [i915]
Feb 13 13:52:18 note kernel: [<ffffffff8105ddef>] ? get_parent_ip+0x9/0x1b
Feb 13 13:52:18 note kernel: [<ffffffff8105de6f>] ? preempt_count_add+0x6e/0x80
Feb 13 13:52:18 note kernel: [<ffffffff8116b217>] ? kernfs_put_active+0x9/0x33
Feb 13 13:52:18 note kernel: [<ffffffff8116c642>] ? kernfs_fop_open+0x219/0x2b4
Feb 13 13:52:18 note kernel: [<ffffffffa06121bd>] ? intel_tv_detect+0x121/0x45e [i915]
Feb 13 13:52:18 note kernel: [<ffffffffa04d8dec>] ? status_show+0x33/0x6d [drm]
Feb 13 13:52:18 note kernel: [<ffffffff81296d3b>] ? dev_attr_show+0x1e/0x46
Feb 13 13:52:18 note kernel: [<ffffffff8116bae4>] ? kernfs_seq_start+0x31/0x7c
Feb 13 13:52:18 note kernel: [<ffffffff8116cb90>] ? sysfs_kf_seq_show+0x7b/0xc6
Feb 13 13:52:18 note kernel: [<ffffffff811336b8>] ? seq_read+0x15a/0x312
Feb 13 13:52:18 note kernel: [<ffffffff8111a40b>] ? vfs_read+0x7e/0xb6
Feb 13 13:52:18 note kernel: [<ffffffff8111a488>] ? SyS_read+0x45/0x70
Feb 13 13:52:18 note kernel: [<ffffffff813cdc2d>] ? system_call_fastpath+0x16/0x1b
Feb 13 13:52:18 note kernel: ---[ end trace dfd61c8260f86803 ]---