Comment 95 for bug 1685442

I am affected by the same bug on on the latest Debian 8 Backport Kernel 4.9.x. The workaround "Putting video=SVIDEO-1:d in the kernel boot command" works for me as well.

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 WARNING: CPU: 1 PID: 907 at /home/zumbi/linux-4.7.2/drivers/gpu/drm/drm_irq.c:1318 drm_wait_one_vblank+0x15b/0x1a0 [drm]
 vblank wait timed out on crtc 0
 Modules linked in: hmac(E) drbg(E) ansi_cprng(E) ctr(E) ccm(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) cpufreq_stats(E) cpufreq_userspace(E) cpufreq_conservative(E) cpufreq_powersave(E) vboxdrv(OE) nfsd(E) auth_rpcgss(E) nfs_acl(E) nfs(E) lockd(E) grace(E) fscache(E) sunrpc(E) iTCO_wdt(E) iTCO_vendor_support(E) hp_wmi(E) sparse_keymap(E) coretemp(E) arc4(E) joydev(E) evdev(E) serio_raw(E) pcspkr(E) snd_hda_codec_hdmi(E) iwl3945(E) snd_hda_codec_analog(E) iwlegacy(E) snd_hda_codec_generic(E) mac80211(E) i915(E) snd_hda_intel(E) lpc_ich(E) mfd_core(E) cfg80211(E) snd_hda_codec(E) snd_hda_core(E) snd_hwdep(E) rfkill(E) snd_pcm(E) drm_kms_helper(E) snd_timer(E) snd(E) soundcore(E) drm(E) shpchp(E) i2c_algo_bit(E) wmi(E) battery(E) tpm_infineon(E) hp_accel(E) lis3lv02d(E) input_polldev(E) video(E) acpi_cpufreq(E) ac(E) button(E) tpm_tis(E) tpm(E) loop(E) fuse(E) parport_pc(E) ppdev(E) lp(E) parport(E) autofs4(E) ext4(E) crc16(E) jbd2(E) mbcache(E) crc32c_generic(E) btrfs(E) xor(E) raid6_pq(E) dm_mod(E) sg(E) sr_mod(E) cdrom(E) sd_mod(E) ata_generic(E) psmouse(E) ata_piix(E) ahci(E) libahci(E) libata(E) scsi_mod(E) fan(E) thermal(E) fjes(E) ehci_pci(E) e1000e(E) uhci_hcd(E) ehci_hcd(E) usbcore(E) ptp(E) usb_common(E) pps_core(E)
 CPU: 1 PID: 907 Comm: Xorg Tainted: G W OE 4.7.0-0.bpo.1-amd64 #1 Debian 4.7.2-1~bpo8+1
 Hardware name: Hewlett-Packard HP Compaq 6720s/30D8, BIOS 68MDU Ver. F.0D 11/04/2008
  0000000000000286 00000000df391234 ffffffffbe717ca5 ffff880079cbf998
  0000000000000000 ffffffffbe47a3e4 0000000000000000 ffff880079cbf9f0
  0000000000000000 000000000000000d ffff88007c3e0e08 0000000000000001
 Call Trace:
  [<ffffffffbe717ca5>] ? dump_stack+0x5c/0x77
  [<ffffffffbe47a3e4>] ? __warn+0xc4/0xe0
  [<ffffffffbe47a45f>] ? warn_slowpath_fmt+0x5f/0x80
  [<ffffffffbe4bb1bb>] ? finish_wait+0x3b/0x70
  [<ffffffffc04cf43b>] ? drm_wait_one_vblank+0x15b/0x1a0 [drm]
  [<ffffffffbe4bb320>] ? wait_woken+0x90/0x90
  [<ffffffffc076e9cd>] ? intel_get_load_detect_pipe+0x61d/0x640 [i915]
  [<ffffffffc07ab24d>] ? intel_tv_detect+0x13d/0x590 [i915]
  [<ffffffffc04de4a0>] ? drm_gtf2_hbreak+0x30/0x60 [drm]
  [<ffffffffc055bd0c>] ? drm_helper_probe_single_connector_modes+0x2cc/0x4f0 [drm_kms_helper]
  [<ffffffffbe9d86ce>] ? mutex_lock+0xe/0x30
  [<ffffffffc04dabd6>] ? drm_mode_getconnector+0x336/0x380 [drm]
  [<ffffffffbe9d850c>] ? __mutex_unlock_slowpath+0x6c/0x90
  [<ffffffffc04cd686>] ? drm_ioctl+0x126/0x490 [drm]
  [<ffffffffc04da8a0>] ? drm_mode_getcrtc+0x120/0x120 [drm]
  [<ffffffffbe60977b>] ? do_vfs_ioctl+0x9b/0x5e0
  [<ffffffffbe5fb02f>] ? SYSC_newfstat+0x2f/0x50
  [<ffffffffbe609d36>] ? SyS_ioctl+0x76/0x90
  [<ffffffffbe4e7e9d>] ? posix_ktime_get_ts+0xd/0x10
  [<ffffffffbe9da736>] ? system_call_fast_compare_end+0xc/0x96
 ---[ end trace 07b886525ef927b8 ]---