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https://bugs.freedesktop.org/show_bug.cgi?id=91511.

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On 2015-07-30T17:38:44+00:00 Gabriele-mzt wrote:

Created attachment 117467
dmesg - warning when switching from X to tty

Using 4.2-rc4 on my Haswell laptop I get the warning you can see in the
dmesg attached whenever I switch from X to tty. The same happens using
4.2-rc1.

This never happened before.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1496433/comments/0

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On 2015-08-25T23:58:04+00:00 Gabriele-mzt wrote:

This issue seems to have been fixed in v4.2-rc8. Closing this.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1496433/comments/1

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On 2015-08-31T09:38:37+00:00 Jonathan McDowell wrote:

I am seeing this on a Dell E7240 (Haswell) freshly booted into 4.2. The
issue was not seen on 4.1.2 or previous.

[ 2698.293746] [drm:check_crtc_state] *ERROR* mismatch in ips_enabled (expected 1, found 0)
[ 2698.293753] ------------[ cut here ]------------
[ 2698.293761] WARNING: CPU: 0 PID: 1833 at drivers/gpu/drm/i915/intel_display.c:12324 check_crtc_state+0x8ab/0xfd0()
[ 2698.293763] pipe state doesn't match!
[ 2698.293780] Modules linked in: fuse ctr ccm xt_addrtype xt_conntrack ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 iptable_filter ip_tables x_tables nf_nat nf_conntrack bridge stp llc dm_thin_pool dm_persistent_data dm_bio_prison dm_bufio libcrc32c loop binfmt_misc bnep nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc arc4 nls_utf8 nls_cp437 vfat fat qmi_wwan uvcvideo videobuf2_vmalloc videobuf2_memops iwlmvm videobuf2_core cdc_mbim v4l2_common cdc_ncm cdc_wdm videodev usbnet mii mac80211 media snd_hda_codec_hdmi dell_smm_hwmon intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp btusb snd_hda_codec_realtek snd_hda_codec_generic joydev iwlwifi btintel bluetooth pcspkr efivars i2c_i801 sg snd_hda_intel cfg80211 snd_hda_codec
[ 2698.293911]  snd_hwdep snd_hda_core snd_pcm snd_timer tpm_tis 8250 serial_core evdev battery ac processor md_mod tpm_rng tpm rng_core efivarfs autofs4 btrfs xor raid6_pq algif_skcipher af_alg crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel ehci_pci ehci_hcd sdhci_pci xhci_pci xhci_hcd thermal sdhci_acpi sdhci mmc_core i2c_hid hid jitterentropy_rng sha256_ssse3 sha256_generic hmac drbg ansi_cprng
[ 2698.293977] CPU: 0 PID: 1833 Comm: Xorg Not tainted 4.2.0 #1
[ 2698.293980] Hardware name: Dell Inc. Latitude E7240/07RPNV, BIOS A15 05/19/2015
[ 2698.293998]  0000000000000000 ffffffff819c26e0 ffffffff816898ee ffff8804030bf858
[ 2698.294004]  ffffffff810b394c ffff8800d5ba9400 ffff88040c3d1000 ffff88040ab40000
[ 2698.294009]  0000000000000001 ffff88040c3d1350 ffffffff810b39c5 ffffffff819f0f1f
[ 2698.294015] Call Trace:
[ 2698.294024]  [<ffffffff816898ee>] ? dump_stack+0x40/0x50
[ 2698.294048]  [<ffffffff810b394c>] ? warn_slowpath_common+0x7c/0xb0
[ 2698.294054]  [<ffffffff810b39c5>] ? warn_slowpath_fmt+0x45/0x50
[ 2698.294059]  [<ffffffff8146563b>] ? check_crtc_state+0x8ab/0xfd0
[ 2698.294066]  [<ffffffff81442c8b>] ? i915_get_crtc_scanoutpos+0x18b/0x230
[ 2698.294093]  [<ffffffff81478116>] ? intel_modeset_check_state+0x206/0xb10
[ 2698.294101]  [<ffffffff81479789>] ? intel_crtc_set_config+0x529/0x590
[ 2698.294108]  [<ffffffff813f6367>] ? drm_crtc_check_viewport+0x27/0xe0
[ 2698.294130]  [<ffffffff813f7bf9>] ? drm_mode_set_config_internal+0x59/0xf0
[ 2698.294137]  [<ffffffff813fbabf>] ? drm_mode_setcrtc+0x17f/0x4d0
[ 2698.294143]  [<ffffffff813edd1d>] ? drm_ioctl+0x16d/0x550
[ 2698.294151]  [<ffffffffc024c930>] ? evdev_read+0xc0/0x2c0 [evdev]
[ 2698.294175]  [<ffffffff811e794e>] ? do_vfs_ioctl+0x2be/0x490
[ 2698.294183]  [<ffffffff810bd942>] ? recalc_sigpending+0x12/0x50
[ 2698.294189]  [<ffffffff811e7b91>] ? SyS_ioctl+0x71/0x80
[ 2698.294194]  [<ffffffff810c08d0>] ? SyS_rt_sigprocmask+0x60/0xa0
[ 2698.294217]  [<ffffffff8168f817>] ? entry_SYSCALL_64_fastpath+0x12/0x6a
[ 2698.294221] ---[ end trace c252f4cf31b49867 ]---

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1496433/comments/2

------------------------------------------------------------------------
On 2015-09-01T16:13:31+00:00 Freedesktop-3 wrote:

Reverting d2944cf21305c754fa8b2d6c1eea05ad5dad7944 fixes 4.2 for me.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1496433/comments/3

------------------------------------------------------------------------
On 2015-09-02T11:57:24+00:00 Jani-nikula wrote:

(In reply to Emil Renner Berthing from comment #3)
> Reverting d2944cf21305c754fa8b2d6c1eea05ad5dad7944 fixes 4.2 for me.

commit d2944cf21305c754fa8b2d6c1eea05ad5dad7944
Author: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Date:   Tue Aug 11 12:31:11 2015 +0200

    drm/i915: Commit planes on each crtc separately.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1496433/comments/4

------------------------------------------------------------------------
On 2015-09-16T12:18:23+00:00 Bugs-i wrote:

That commit fixes another issue unfortunately. It looks like
post_enable_primary might not be called in some cases.

Can I have a drm.debug=0x1e log of the vt switching?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1496433/comments/5


** Changed in: linux
       Status: Unknown => Incomplete

** Changed in: linux
   Importance: Unknown => Medium

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https://bugs.launchpad.net/bugs/1496433

Title:
  Error in i915 driver

Status in Linux:
  Incomplete
Status in linux package in Ubuntu:
  Incomplete
Status in linux source package in Wily:
  Incomplete

Bug description:
  The 7th of september I lost my Xorg display on wily. I was always in failsafe mode.
  I still could get openbox to run, which was still loading i915, but didn't consume any 3D/advanced instruction I thinK.
  I didn't got too much time to go beyond. 

  As I got also a btrfs kernel dump message, so I checked my ram at
  least with memtest86+, all was OK.

  Reverting to vivid allowed me to be back on unity.

  Wily-amd64, kernel 4.2.0.7-7-generic/low-latency

  Here are the traces I got:
  [   22.335530] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in ips_enabled (expected 1, found 0)
  [   22.335535] ------------[ cut here ]------------
  [   22.335562] WARNING: CPU: 0 PID: 2190 at /build/linux-4dBub_/linux-4.2.0/drivers/gpu/drm/i915/intel_display.c:12324 check_crtc_state+0x2c5/0x440 [i915]()
  [   22.335564] pipe state doesn't match!
  [   22.335566] Modules linked in: ipt_REJECT nf_reject_ipv4 ebtable_filter ebtables ip6_tables overlay xt_addrtype xt_conntrack xt_CHECKSUM ax88179_178a iptable_mangle usbnet ipt_MASQUERADE rtsx_usb_ms nf_nat_masquerade_ipv4 aufs iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 mii memstick nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp bridge stp llc binfmt_misc iptable_filter ip_tables x_tables bnep drbg ansi_cprng dm_crypt nls_iso8859_1 intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul snd_soc_rt5640 glue_helper ablk_helper snd_soc_rl6231 cryptd snd_soc_core input_leds serio_raw hid_sensor_rotation snd_compress ac97_bus snd_pcm_dmaengine snd_seq_midi snd_seq_midi_event snd_hda_codec_realtek hid_sensor_incl_3d
  [   22.335625]  uvcvideo videobuf2_vmalloc snd_hda_codec_generic hid_sensor_als videobuf2_memops hid_sensor_magn_3d snd_hda_codec_hdmi hid_sensor_accel_3d hid_sensor_gyro_3d btusb hid_sensor_trigger btrtl industrialio_triggered_buffer btbcm snd_rawmidi joydev btintel videobuf2_core kfifo_buf snd_hda_intel industrialio snd_hda_codec hid_sensor_iio_common v4l2_common videodev snd_hda_core hid_multitouch snd_hwdep media bluetooth mei_me snd_seq lpc_ich mei snd_pcm snd_seq_device dw_dmac dw_dmac_core snd_timer snd soundcore ideapad_laptop sparse_keymap 8250_dw i2c_designware_platform mac_hid spi_pxa2xx_platform soc_button_array i2c_designware_core snd_soc_sst_acpi kvm_intel kvm parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq hid_sensor_custom hid_sensor_hub uas usb_storage bcache hid_generic usbhid
  [   22.335682]  rtsx_usb_sdmmc rtsx_usb i915 i2c_algo_bit drm_kms_helper drm psmouse ahci libahci sdhci_acpi sdhci video i2c_hid hid
  [   22.335698] CPU: 0 PID: 2190 Comm: Xorg Tainted: G        W       4.2.0-7-lowlatency #7-Ubuntu
  [   22.335700] Hardware name: LENOVO 20344/INVALID, BIOS 96CN25WW(V1.11) 07/09/2014
  [   22.335703]  ffffffffc02081e8 ffff8800995c77e8 ffffffff817bdf25 0000000000000000
  [   22.335708]  ffff8800995c7838 ffff8800995c7828 ffffffff81078016 ffff8800995c7858
  [   22.335712]  ffff8800995c78c0 ffff880035571000 0000000000000001 ffff880035571350
  [   22.335717] Call Trace:
  [   22.335724]  [<ffffffff817bdf25>] dump_stack+0x4c/0x6e
  [   22.335729]  [<ffffffff81078016>] warn_slowpath_common+0x86/0xc0
  [   22.335734]  [<ffffffff81078096>] warn_slowpath_fmt+0x46/0x50
  [   22.335758]  [<ffffffffc019bcf1>] ? intel_pipe_config_compare+0xb31/0xc60 [i915]
  [   22.335781]  [<ffffffffc019c0e5>] check_crtc_state+0x2c5/0x440 [i915]
  [   22.335809]  [<ffffffffc01afa9e>] intel_modeset_check_state+0x20e/0x6b0 [i915]
  [   22.335834]  [<ffffffffc01b0c47>] intel_crtc_set_config+0x4c7/0x580 [i915]
  [   22.335852]  [<ffffffffc00880c6>] drm_mode_set_config_internal+0x66/0x100 [drm]
  [   22.335870]  [<ffffffffc008c688>] drm_mode_setcrtc+0x3a8/0x4c0 [drm]
  [   22.335883]  [<ffffffffc007d3a5>] drm_ioctl+0x125/0x610 [drm]
  [   22.335898]  [<ffffffffc008c2e0>] ? drm_mode_setplane+0x1b0/0x1b0 [drm]
  [   22.335903]  [<ffffffff81205e15>] do_vfs_ioctl+0x285/0x460
  [   22.335908]  [<ffffffff810835ff>] ? recalc_sigpending+0x1f/0x60
  [   22.335912]  [<ffffffff8120fa97>] ? __fget+0x77/0xb0
  [   22.335916]  [<ffffffff81206069>] SyS_ioctl+0x79/0x90
  [   22.335921]  [<ffffffff817c4bf2>] entry_SYSCALL_64_fastpath+0x16/0x75
  [   22.335924] ---[ end trace 7e8588f0d9eb10f9 ]---

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