Public bug reported:
I am using an older Ubuntu mainline kernel with Vivid. The computer I am
using is a Dell XPS 9343 which is known not to do too well with linux,
like most new dell computers. However the only issue that actively
bothers me the fact that Xorg is getting crashed all the time by the
frame buffer drm in the intel driver. This can be observer in this
trace,
[33477.084660] [ cut here ]
[33477.084688] WARNING: CPU: 0 PID: 901 at
/build/linux-OdodyZ/linux-3.19.0/drivers/gpu/drm/i915/intel_display.c:1256
assert_plane.constprop.87+0x7b/0x90 [i915]()
[33477.084689] plane A assertion failure (expected on, current off)
[33477.084706] Modules linked in: isofs pci_stub vboxpci(OE) vboxnetadp(OE)
vboxnetflt(OE) vboxdrv(OE) binfmt_misc rfcomm bnep nls_iso8859_1 cdc_acm btusb
bluetooth uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core
v4l2_common videodev media usbhid joydev snd_hda_codec_hdmi wl(POE) dell_wmi
hid_multitouch sparse_keymap intel_rapl iosf_mbi x86_pkg_temp_thermal
intel_powerclamp coretemp kvm_intel dell_laptop dcdbas kvm crct10dif_pclmul
crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul
glue_helper ablk_helper cryptd serio_raw dell_led snd_hda_codec_realtek
snd_soc_rt286 snd_hda_codec_generic snd_soc_core snd_compress snd_pcm_dmaengine
i915 lpc_ich snd_hda_intel snd_seq_midi snd_hda_controller snd_seq_midi_event
cfg80211 snd_hda_codec snd_hwdep rtsx_pci_ms drm_kms_helper memstick
[33477.084720] mei_me snd_rawmidi snd_pcm drm i2c_algo_bit shpchp mei wmi
int3403_thermal soc_button_array snd_seq snd_seq_device snd_timer snd soundcore
i2c_hid hid video dw_dmac dw_dmac_core snd_soc_sst_acpi 8250_dw
i2c_designware_platform i2c_designware_core spi_pxa2xx_platform int3402_thermal
int3400_thermal acpi_thermal_rel processor_thermal_device acpi_pad mac_hid
parport_pc ppdev lp parport autofs4 uas usb_storage rtsx_pci_sdmmc psmouse ahci
libahci sdhci_acpi sdhci rtsx_pci
[33477.084722] CPU: 0 PID: 901 Comm: Xorg Tainted: PW OE
3.19.0-25-generic #26-Ubuntu
[33477.084723] Hardware name: Dell Inc. XPS 13 9343/0310JH, BIOS A05 07/14/2015
[33477.084725] c0611310 880212b076f8 817c4518
888e888e
[33477.084726] 880212b07748 880212b07738 81076a6a
8802134c4200
[33477.084727] 880212f3d000 880036582800
880036582800
[33477.084727] Call Trace:
[33477.084732] [817c4518] dump_stack+0x45/0x57
[33477.084735] [81076a6a] warn_slowpath_common+0x8a/0xc0
[33477.084736] [81076ae6] warn_slowpath_fmt+0x46/0x50
[33477.084751] [c05ad57b] assert_plane.constprop.87+0x7b/0x90 [i915]
[33477.084764] [c05b57f1] hsw_disable_ips+0x41/0x190 [i915]
[33477.084777] [c05b5bb8] intel_crtc_disable_planes+0x48/0x140 [i915]
[33477.084788] [c05b691f] haswell_crtc_disable+0x4f/0x3c0 [i915]
[33477.084800] [c05b78b9] __intel_set_mode+0xa59/0xc80 [i915]
[33477.084812] [c05be48b] intel_crtc_set_config+0xbfb/0xf70 [i915]
[33477.084815] [810a73a8] ? __enqueue_entity+0x78/0x80
[33477.084827] [c036fb36] drm_mode_set_config_internal+0x66/0x100
[drm]
[33477.084833] [c04016b8] restore_fbdev_mode+0xc8/0xf0
[drm_kms_helper]
[33477.084839] [c0403729]
drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x80 [drm_kms_helper]
[33477.084843] [c04037a2] drm_fb_helper_set_par+0x22/0x50
[drm_kms_helper]
[33477.084857] [c05ca40a] intel_fbdev_set_par+0x1a/0x60 [i915]
[33477.084859] [814351fa] fb_set_var+0x18a/0x410
[33477.084862] [8109fd99] ? check_preempt_curr+0x89/0xa0
[33477.084863] [810a73a8] ? __enqueue_entity+0x78/0x80
[33477.084865] [810aed70] ? enqueue_entity+0x400/0xc30
[33477.084867] [8142bc29] fbcon_blank+0x229/0x300
[33477.084869] [814bbb7a] do_unblank_screen+0xba/0x1f0
[33477.084872] [814b166d] complete_change_console+0x5d/0xf0
[33477.084873] [814b288a] vt_ioctl+0x118a/0x1460
[33477.084881] [c036491c] ? drm_ioctl+0x8c/0x680 [drm]
[33477.084883] [814a4801] tty_ioctl+0x411/0xcb0
[33477.084886] [811f5ca5] ? do_readv_writev+0x185/0x280
[33477.084888] [81209370] do_vfs_ioctl+0x2e0/0x4e0
[33477.084889] [812095f1] SyS_ioctl+0x81/0xa0
[33477.084890] [817cb5cd] system_call_fastpath+0x16/0x1b
[33477.084891] ---[ end trace 4514549be501e890 ]---
[33479.411280] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe A FIFO underrun
I can confirm that the crash occurs in different ways according to
different traces I've read but it would be impossible to compile all of
them. The crashes of the screen are not apparent to any function done on
the user end. They are random and can sometimes be very spaced out or
sometimes happen many times in a row. In order to get the screen working
without restarting lightdm, I have to switch into tty1
