[Bug 70507] [IVB regression FDI link train fail] DP attached 2560x1440 display goes blank

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70507

--- Comment #4 from Jan-Michael Brummer <jan.brummer at tabos.org> ---
I've tested your git version and it alsa throws an error in
ironlake_crtc_mode_set

[   19.416518] ------------[ cut here ]------------
[   19.416546] WARNING: CPU: 0 PID: 993 at
drivers/gpu/drm/i915/intel_display.c:5879 ironlake_crtc_mode_set+0xc01/0xc60
[i915]()
[   19.416547] Modules linked in: fuse ebtable_nat nf_conntrack_netbios_ns
nf_conntrack_broadcast ipt_MASQUERADE ip6table_mangle ip6table_security
ip6table_raw ip6t_REJECT iptable_nat nf_nat_ipv4 iptable_mangle
iptable_security iptable_raw nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack
ebtable_filter ebtables ip6table_filter vboxpci(OF) vboxnetadp(OF)
vboxnetflt(OF) ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 nf_nat
nf_conntrack ip6_tables vboxdrv(OF) bnep arc4 iwldvm mac80211
snd_hda_codec_hdmi snd_hda_codec_idt x86_pkg_temp_thermal coretemp kvm_intel
kvm iwlwifi snd_hda_intel snd_hda_codec nfsd cfg80211 uvcvideo snd_hwdep
snd_seq iTCO_wdt iTCO_vendor_support btusb hp_wmi snd_seq_device bluetooth
videobuf2_vmalloc e1000e ppdev sparse_keymap videobuf2_memops crc32_pclmul
snd_pcm videobuf2_core
[   19.416569]  crc32c_intel videodev ghash_clmulni_intel auth_rpcgss sdhci_pci
snd_page_alloc sdhci tpm_infineon snd_timer mmc_core microcode media nfs_acl
snd mei_me lockd joydev rfkill mei ptp serio_raw pcspkr lpc_ich pps_core
soundcore mfd_core shpchp parport_pc wmi sunrpc tpm_tis parport tpm hp_accel
tpm_bios acpi_cpufreq lis3lv02d input_polldev binfmt_misc i915 i2c_algo_bit
drm_kms_helper drm firewire_ohci firewire_core crc_itu_t i2c_core video
[   19.416587] CPU: 0 PID: 993 Comm: Xorg Tainted: GF          O
3.12.0-rc5-jbr+ #1
[   19.416589] Hardware name: Hewlett-Packard HP EliteBook 8470p/179B, BIOS
68ICF Ver. F.43 07/16/2013
[   19.416590]  0000000000000009 ffff880231cfda50 ffffffff8165eaed
0000000000000000
[   19.416592]  ffff880231cfda88 ffffffff810680ad ffff880232b0f000
ffff88022ea28000
[   19.416594]  0000000000000000 ffff88022ea28000 ffff88022ea2aa98
ffff880231cfda98
[   19.416596] Call Trace:
[   19.416601]  [<ffffffff8165eaed>] dump_stack+0x45/0x56
[   19.416604]  [<ffffffff810680ad>] warn_slowpath_common+0x7d/0xa0
[   19.416606]  [<ffffffff8106818a>] warn_slowpath_null+0x1a/0x20
[   19.416620]  [<ffffffffa00e1a41>] ironlake_crtc_mode_set+0xc01/0xc60 [i915]
[   19.416633]  [<ffffffffa00e5174>] __intel_set_mode+0x6b4/0x1510 [i915]
[   19.416646]  [<ffffffffa00e80b6>] intel_set_mode+0x16/0x30 [i915]
[   19.416656]  [<ffffffffa00e89b3>] intel_crtc_set_config+0x7e3/0x9d0 [i915]
[   19.416666]  [<ffffffffa0052ffd>] drm_mode_set_config_internal+0x5d/0xe0
[drm]
[   19.416675]  [<ffffffffa0055ad7>] drm_mode_setcrtc+0xf7/0x5d0 [drm]
[   19.416682]  [<ffffffffa0046bf2>] drm_ioctl+0x522/0x650 [drm]
[   19.416688]  [<ffffffff811bb74d>] do_vfs_ioctl+0x2dd/0x4b0
[   19.416689]  [<ffffffff811bb9a1>] SyS_ioctl+0x81/0xa0
[   19.416692]  [<ffffffff8166dae9>] system_call_fastpath+0x16/0x1b
[   19.416693] ---[ end trace 98a0e0c6a7687072 ]---

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