[Bug 79418] New: [i855GM] *ERROR* mismatch in adjusted_mode.crtc_clock

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79418

          Priority: medium
            Bug ID: 79418
          Assignee: chris at chris-wilson.co.uk
           Summary: [i855GM] *ERROR* mismatch in adjusted_mode.crtc_clock
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: minor
    Classification: Unclassified
                OS: Linux (All)
          Reporter: Felix.Braun at mail.McGill.ca
          Hardware: x86 (IA32)
            Status: NEW
           Version: unspecified
         Component: Driver/intel
           Product: xorg

I'm running updated ubuntu trusty on an intel 855GM platform. On startup I get
the attached error message. There are minor graphics problems when running X:
some characters are displayed as black boxes in the firefox address bar
everything else seems to be OK.

xserver-xorg-video-intel 2:2.99.910-0ubuntu1
libdrm 2.4.52-1

[   36.450103] [drm:intel_pipe_config_compare] *ERROR* mismatch in
adjusted_mode.crtc_clock (expected 79500, found 39735)
[   36.450114] ------------[ cut here ]------------
[   36.450181] WARNING: CPU: 0 PID: 1010 at
/build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_display.c:9299
check_crtc_state+0x221/0x320 [i915]()
[   36.450274] pipe state doesn't match!
[   36.450279] Modules linked in: ctr ccm snd_intel8x0 arc4 snd_ac97_codec
ac97_bus snd_pcm rt2500pci rt2x00pci snd_page_alloc rt2x00mmio snd_seq_midi
snd_seq_midi_event rt2x00lib snd_rawmidi mac80211 i915 snd_seq cfg80211 pcmcia
snd_seq_device eeprom_93cx6 snd_timer yenta_socket drm_kms_helper pcmcia_rsrc
snd pcmcia_core drm soundcore serio_raw lpc_ich i2c_algo_bit parport_pc shpchp
ppdev video mac_hid lp parport 8139too firewire_ohci sdhci_pci firewire_core
8139cp sdhci mii crc_itu_t psmouse
[   36.450353] CPU: 0 PID: 1010 Comm: gpu-manager Tainted: G        W   
3.13.0-27-generic #50-Ubuntu
[   36.450357] Hardware name: TWINHEAD F10DT/To be filled by O.E.M., BIOS
080011  10/06/2005
[   36.450362]  00000000 00000000 dcfdf994 c164edf3 dcfdf9d4 dcfdf9c4 c10567ee
e096e950
[   36.450374]  dcfdf9f0 000003f2 e0964a44 00002453 e0910bb1 e0910bb1 dd6de9d8
dd699000
[   36.450386]  dd69964c dcfdf9dc c1056843 00000009 dcfdf9d4 e096e950 dcfdf9f0
dcfdfc44
[   36.450398] Call Trace:
[   36.450485]  [<c164edf3>] dump_stack+0x41/0x52
[   36.450496]  [<c10567ee>] warn_slowpath_common+0x7e/0xa0
[   36.450543]  [<e0910bb1>] ? check_crtc_state+0x221/0x320 [i915]
[   36.450586]  [<e0910bb1>] ? check_crtc_state+0x221/0x320 [i915]
[   36.450594]  [<c1056843>] warn_slowpath_fmt+0x33/0x40
[   36.450638]  [<e0910bb1>] check_crtc_state+0x221/0x320 [i915]
[   36.450774]  [<e091d293>] intel_modeset_check_state+0x283/0x750 [i915]
[   36.450823]  [<e091d7f0>] intel_set_mode+0x30/0x40 [i915]
[   36.450868]  [<e091d8c4>] intel_release_load_detect_pipe+0xc4/0xf0 [i915]
[   36.450997]  [<e09217e5>] intel_crt_detect+0x4d5/0x890 [i915]
[   36.451014]  [<e0365158>]
drm_helper_probe_single_connector_modes+0x1d8/0x360 [drm_kms_helper]
[   36.451026]  [<c1653c00>] ? mutex_lock+0x10/0x28
[   36.451067]  [<e04a656d>] drm_mode_getconnector+0x32d/0x390 [drm]
[   36.451101]  [<e04a6240>] ? drm_mode_getcrtc+0xc0/0xc0 [drm]
[   36.451206]  [<e0499792>] drm_ioctl+0x472/0x500 [drm]
[   36.451239]  [<e04a6240>] ? drm_mode_getcrtc+0xc0/0xc0 [drm]
[   36.451252]  [<c1087871>] ? set_next_entity+0xb1/0xe0
[   36.451261]  [<c100ecb0>] ? __switch_to+0xb0/0x340
[   36.451283]  [<e0499320>] ? drm_free_buffer+0x30/0x30 [drm]
[   36.451292]  [<c1189902>] do_vfs_ioctl+0x2e2/0x4d0
[   36.451299]  [<c1652578>] ? __schedule+0x358/0x770
[   36.451305]  [<c118683d>] ? final_putname+0x1d/0x40
[   36.451312]  [<c11869e4>] ? putname+0x24/0x40
[   36.451321]  [<c11782c6>] ? do_sys_open+0x196/0x260
[   36.451403]  [<c1189b50>] SyS_ioctl+0x60/0x80
[   36.451413]  [<c165d0cd>] sysenter_do_call+0x12/0x28
[   36.451419] ---[ end trace 550e8fcd38785caa ]---

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