During resume from hibernation, I started to see the warning below since
commit b8f102e8bf71cacf33326360fdf9dcfd1a63925b
Author: Egbert Eich <e...@suse.de>
Date: Fri Jul 26 14:14:24 2013 +0200
drm/i915: Add messages useful for HPD storm detection debugging (v2)
the system is otherwise working properly, and so far it seems to happen
only during hibernation resume.
[13766.703229] WARNING: CPU: 1 PID: 0 at drivers/gpu/drm/i915/i915_irq.c:1001
i965_irq_handler+0x492/0x680 [i915]()
[13766.703230] Received HPD interrupt although disabled
[13766.703335] Modules linked in: af_packet tun iptable_mangle xt_DSCP
nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables xt_tcpudp
nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack iptable_filter ip_tables
x_tables rfcomm bn
ep btusb bluetooth cpufreq_conservative cpufreq_userspace cpufreq_powersave
iTCO_wdt iTCO_vendor_support snd_hda_codec_conexant snd_hda_intel snd_hda_codec
kvm_intel snd_hwdep kvm snd_pcm thinkpad_acpi snd_seq iwldvm mac80211 sg
snd_timer
iwlwifi snd_seq_device cfg80211 snd i2c_i801 pcspkr rfkill lpc_ich mfd_core
e1000e ehci_pci snd_page_alloc ptp pps_core tpm_tis tpm soundcore battery ac
wmi tpm_bios acpi_cpufreq autofs4 uhci_hcd ehci_hcd usbcore usb_common i915
drm_kms_he
lper drm i2c_algo_bit video button edd fan processor ata_generic thermal
thermal_sys
[13766.703339] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G W
3.12.0-rc3 #1
[13766.703341] Hardware name: LENOVO 7470BN2/7470BN2, BIOS 6DET38WW (2.02 )
12/19/2008
[13766.703350] 00000000000003e9 ffff88007c283d18 ffffffff81583013
ffff88007c283d58
[13766.703357] ffffffff8104d297 ffff88007c283d98 000000000000000c
0000000000000002
[13766.703365] ffff880037158000 0000000000000004 ffff880037158000
ffff88007c283db8
[13766.703367] Call Trace:
[13766.703375] <IRQ> [<ffffffff81583013>] dump_stack+0x7a/0x97
[13766.703382] [<ffffffff8104d297>] warn_slowpath_common+0x87/0xb0
[13766.703388] [<ffffffff8104d361>] warn_slowpath_fmt+0x41/0x50
[13766.703425] [<ffffffffa00c7be2>] i965_irq_handler+0x492/0x680 [i915]
[13766.703436] [<ffffffff810a40fc>] handle_irq_event_percpu+0xac/0x220
[13766.703442] [<ffffffff810a42b9>] handle_irq_event+0x49/0x70
[13766.703449] [<ffffffff810a7b2f>] handle_edge_irq+0x7f/0x150
[13766.703454] [<ffffffff81004a89>] handle_irq+0x59/0x150
[13766.703461] [<ffffffff8158d371>] ? atomic_notifier_call_chain+0x11/0x20
[13766.703466] [<ffffffff8100403b>] do_IRQ+0x5b/0xe0
[13766.703474] [<ffffffff815895af>] common_interrupt+0x6f/0x6f
[13766.703482] <EOI> [<ffffffff8146cf74>] ? cpuidle_enter_state+0x54/0xd0
[13766.703488] [<ffffffff8146cf70>] ? cpuidle_enter_state+0x50/0xd0
[13766.703496] [<ffffffff8146d37a>] cpuidle_idle_call+0x10a/0x160
[13766.703503] [<ffffffff8100b7b9>] arch_cpu_idle+0x9/0x30
[13766.703509] [<ffffffff810a35cb>] cpu_idle_loop+0x8b/0x270
[13766.703515] [<ffffffff810a37ce>] cpu_startup_entry+0x1e/0x20
[13766.703522] [<ffffffff8103115e>] start_secondary+0x8e/0x90
It's not a single occurence, it's quite a flood within the same second,
ending with
[drm] GMBUS [i915 gmbus dpb] timed out, falling back to bit banging on pin 5
[drm] HPD interrupt storm detected on connector HDMI-A-1: switching from
hotplug detection to pollin
If this really needs to be enabled unconditionally by default (?), having
it to warn only once would be nice.
If there is anything else I could do to make this go away, please let me
know. I don't want to be running Tainted: W kernel from now forever on :)
This is a standard x200s thinkpad, no fancy development HW.
--
Jiri Kosina
SUSE Labs
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