[Bug 83516] New: [HSW] *ERROR* too many voltage retries, give up

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83516

          Priority: medium
            Bug ID: 83516
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [HSW] *ERROR* too many voltage retries, give up
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: chris.cheney at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 105779
  --> https://bugs.freedesktop.org/attachment.cgi?id=105779&action=edit
dmesg output showing problem

I have a haswell i7-4770k desktop system that has 2 HDMI ports and 1
DisplayPort connection. I have 2 HDMI monitors hooked up to the HDMI ports and
a HDMI monitor hooked to an active DisplayPort to HDMI adapter. With earlier
kernels I was getting an error of "[drm] HPD interrupt storm detected on
connector DP-1: switching from hotplug detection to polling" and the
displayport does not work reliably but after trying the latest
drm-intel-nightly from tonight I get a different error of "*ERROR* too many
voltage retries, give up". The three monitors work fine in the current
configuration under Windows so I think it may be a driver issue.

[   48.237921] [drm:intel_dp_start_link_train] *ERROR* too many voltage
retries, give up

There is also a backtrace in the dmesg output:

[   48.741864] WARNING: CPU: 0 PID: 256 at
/home/apw/COD/linux/drivers/gpu/drm/i915/intel_dp.c:3649
intel_dp_link_down+0x223/0x260 [i915]()
[   48.741865] Modules linked in: bnep rfcomm bluetooth joydev hid_logitech_dj
usbhid uas usb_storage hid snd_hda_codec_hdmi usblp nls_iso8859_1 intel_rapl
x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul
crc32_pclmul ghash_clmulni_intel aesni_intel mxm_wmi snd_hda_codec_realtek
aes_x86_64 snd_hda_codec_generic lrw gf128mul glue_helper ablk_helper cryptd
i915 snd_hda_intel serio_raw snd_hda_controller snd_seq_midi snd_hda_codec
snd_seq_midi_event snd_hwdep snd_rawmidi mei_me lpc_ich snd_pcm mei video
snd_seq wmi drm_kms_helper tpm_infineon snd_seq_device drm mac_hid snd_timer
snd soundcore ppdev lp parport psmouse firewire_ohci igb firewire_core ahci
e1000e i2c_algo_bit dca libahci crc_itu_t ptp pps_core [last unloaded:
parport_pc]
[   48.742032]  [<ffffffffc0152aa0>] ? drm_modeset_lock+0x40/0x100 [drm]
[   48.742039]  [<ffffffffc0144380>] drm_mode_set_config_internal+0x60/0x100
[drm]
[   48.742045]  [<ffffffffc0196583>] restore_fbdev_mode+0xd3/0x100
[drm_kms_helper]
[   48.742049]  [<ffffffffc019667c>]
drm_fb_helper_restore_fbdev_mode_unlocked+0x2c/0x50 [drm_kms_helper]
[   48.742053]  [<ffffffffc0197d61>] drm_fb_helper_set_par+0x31/0x80
[drm_kms_helper]
[   48.742056]  [<ffffffffc0197cdc>] drm_fb_helper_hotplug_event+0xcc/0x120
[drm_kms_helper]
[   48.742071]  [<ffffffffc018f55b>] drm_kms_helper_hotplug_event+0x2b/0x40
[drm_kms_helper]

--

I am attaching a 'drm.debug=0xe log_buf_len=4M" dmesg which seems to be more
useful from looking around in the bug reports. I had not attached the
adapter/monitor at boot time in the dmesg, but plugged it in at roughly 47s in
the boot log.

If you would like me to do further testing I'm available anytime. :-)

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