I'm having the same unpleasant experience with the dell D3100 product on Fedora 22 4.2.3-200.fc22.x86_64
It works briefly if I reboot, but if for any reason X restarts, like logging out, the following happens:
[ 451.098295] ------------[ cut here ]------------
[ 451.098323] WARNING: CPU: 2 PID: 3358 at drivers/gpu/drm/i915/intel_display.c:1362 assert_plane.constprop.98+0x6f/0x90 [i915]()
[ 451.098325] plane A assertion failure (expected on, current off)
[ 451.098353] Modules linked in: cmac xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 tun fuse nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack snd_usb_audio snd_usbmidi_lib snd_rawmidi evdi(O) ebtable_nat ebtable_broute bridge ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw rfcomm bnep arc4 ath9k ath9k_common ath9k_hw ath mac80211 cfg80211 snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_codec_generic iTCO_wdt iTCO_vendor_support acer_wmi sparse_keymap intel_rapl iosf_mbi x86_pkg_temp_thermal coretemp kvm_intel kvm vfat
[ 451.098386] fat i2c_i801 uvcvideo lpc_ich snd_hda_intel ath3k btusb snd_hda_codec videobuf2_vmalloc videobuf2_core btrtl snd_hda_core btbcm videobuf2_memops btintel v4l2_common bluetooth videodev snd_hwdep snd_seq snd_seq_device snd_pcm joydev media rfkill snd_timer snd soundcore mei_me shpchp mei dw_dmac dw_dmac_core i2c_designware_platform wmi i2c_designware_core nfsd binfmt_misc auth_rpcgss nfs_acl lockd grace sunrpc vboxnetadp(O) vboxnetflt(O) vboxdrv(O) dm_crypt hid_logitech_hidpp hid_logitech_dj hid_multitouch cdc_mbim cdc_wdm cdc_ncm usbnet i915 i2c_algo_bit drm_kms_helper crct10dif_pclmul drm crc32_pclmul crc32c_intel 8021q garp stp llc mrp sdhci_acpi ghash_clmulni_intel r8169 serio_raw mii sdhci mmc_core video i2c_hid
[ 451.098389] CPU: 2 PID: 3358 Comm: Xorg Tainted: G O 4.2.3-200.fc22.x86_64 #1
[ 451.098390] Hardware name: Acer Aspire R3-471T/EA42_HB, BIOS V1.09 05/20/2015
[ 451.098393] 0000000000000000 0000000013c906b3 ffff8801c1adb6e8 ffffffff8177220a
[ 451.098394] 0000000000000000 ffff8801c1adb740 ffff8801c1adb728 ffffffff8109e4a6
[ 451.098396] 0000000000000000 0000000000000000 ffff88003f630000 ffff88003f4b3000
[ 451.098396] Call Trace:
[ 451.098401] [<ffffffff8177220a>] dump_stack+0x45/0x57
[ 451.098406] [<ffffffff8109e4a6>] warn_slowpath_common+0x86/0xc0
[ 451.098409] [<ffffffff8109e535>] warn_slowpath_fmt+0x55/0x70
[ 451.098430] [<ffffffffa01c2daf>] assert_plane.constprop.98+0x6f/0x90 [i915]
[ 451.098448] [<ffffffffa01cbd99>] hsw_disable_ips+0x39/0x180 [i915]
[ 451.098463] [<ffffffffa01cbf34>] intel_pre_disable_primary+0x54/0x90 [i915]
[ 451.098478] [<ffffffffa01cbfaa>] intel_crtc_disable_planes+0x3a/0x100 [i915]
[ 451.098492] [<ffffffffa01cc906>] __intel_set_mode+0x226/0xb60 [i915]
[ 451.098506] [<ffffffffa01ce54f>] ? intel_modeset_compute_config+0x3af/0xb60 [i915]
[ 451.098521] [<ffffffffa01d3ee6>] intel_crtc_set_config+0x2b6/0x580 [i915]
[ 451.098534] [<ffffffffa00dd326>] drm_mode_set_config_internal+0x66/0x100 [drm]
[ 451.098540] [<ffffffffa014d512>] restore_fbdev_mode+0xc2/0xf0 [drm_kms_helper]
[ 451.098545] [<ffffffffa014f399>] drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x70 [drm_kms_helper]
[ 451.098549] [<ffffffffa014f402>] drm_fb_helper_set_par+0x22/0x40 [drm_kms_helper]
[ 451.098565] [<ffffffffa01e284a>] intel_fbdev_set_par+0x1a/0x60 [i915]
[ 451.098568] [<ffffffff8141376f>] ? fb_set_var+0x2ef/0x460
[ 451.098570] [<ffffffff814136b6>] fb_set_var+0x236/0x460
[ 451.098573] [<ffffffff810d16ea>] ? check_preempt_wakeup+0xfa/0x210
[ 451.098575] [<ffffffff810d11c9>] ? update_curr+0x79/0x150
[ 451.098578] [<ffffffff814097d2>] fbcon_blank+0x312/0x360
[ 451.098582] [<ffffffff8148e493>] do_unblank_screen+0xd3/0x1a0
[ 451.098584] [<ffffffff814834cd>] complete_change_console+0x5d/0xe0
[ 451.098585] [<ffffffff81484812>] vt_ioctl+0x12c2/0x12e0
[ 451.098589] [<ffffffff8123863f>] ? file_update_time+0xbf/0x110
[ 451.098591] [<ffffffff81477063>] tty_ioctl+0x3c3/0xb80
[ 451.098593] [<ffffffff811d5f80>] ? handle_mm_fault+0xcc0/0x17d0
[ 451.098596] [<ffffffff812312b5>] do_vfs_ioctl+0x295/0x470
[ 451.098598] [<ffffffff8132930d>] ? selinux_file_ioctl+0x4d/0xc0
[ 451.098600] [<ffffffff81231509>] SyS_ioctl+0x79/0x90
[ 451.098603] [<ffffffff810656df>] ? do_page_fault+0x2f/0x80
[ 451.098607] [<ffffffff81778bee>] entry_SYSCALL_64_fastpath+0x12/0x71
[ 451.098608] ---[ end trace de27aff85f318a5c ]---
[ 451.477897] [D] add_store increasing device count to 3
[ 451.478656] [D] evdi_crtc_init drm_crtc_init: 0
[ 451.478660] [D] evdi_encoder_init drm_encoder_init: 0
[ 451.478704] [D] evdi_detect Painter is disconnected
[ 451.478707] evdi evdi.2: No connectors reported connected with modes
[ 451.478710] [drm] Cannot find any crtc or sizes - going 1024x768
[ 451.480090] evdi evdi.2: fb3: evdidrmfb frame buffer device
[ 451.480094] [drm] evdi: evdi_stats_init
[ 451.480100] [drm] Initialized evdi 1.0.68 19700101 on minor 3
[ 453.842446] [drm:check_crtc_state [i915]] *ERROR* mismatch in ips_enabled (expected 1, found 0)
[ 453.842633] [drm:check_crtc_state [i915]] *ERROR* mismatch in ips_enabled (expected 1, found 0)
[ 454.615665] [D] evdi_detect Painter is disconnected
[ 454.615698] [D] evdi_detect Painter is disconnected
[ 454.616269] [D] evdi_painter_crtc_state_notify (dev=0) Notifying crtc state: 0
[ 454.616281] [D] evdi_painter_crtc_state_notify (dev=0) Notifying crtc state: 0
[ 457.741639] [D] evdi_detect Painter is disconnected
[ 466.016729] [W] evdi_painter_disconnect (dev=0) An unknown connection to ffff8801c1b14400 tries to close us - ignoring
[ 466.036547] [D] evdi_painter_connect (dev=3) Connected with ffff8801c1b14400
[ 466.036552] [D] evdi_painter_connect (dev=3) Edid (3 bytes): 00 ff ff
[ 466.036555] [D] evdi_detect (dev=3) Painter is connected
[ 466.039595] [D] add_store increasing device count to 4
[ 466.041002] [D] evdi_crtc_init drm_crtc_init: 0
[ 466.041007] [D] evdi_encoder_init drm_encoder_init: 0
[ 466.041065] [D] evdi_detect Painter is disconnected
[ 466.041070] evdi evdi.3: No connectors reported connected with modes
[ 466.041073] [drm] Cannot find any crtc or sizes - going 1024x768
[ 466.043595] evdi evdi.3: fb4: evdidrmfb frame buffer device
[ 466.043600] [drm] evdi: evdi_stats_init
[ 466.043606] [drm] Initialized evdi 1.0.68 19700101 on minor 4
[ 466.045223] [D] evdi_detect (dev=3) Painter is connected
[ 466.045228] [D] evdi_painter_get_edid (dev=3) 00 ff ff
[ 466.052431] [D] evdi_detect (dev=3) Painter is connected
[ 466.052436] [D] evdi_painter_get_edid (dev=3) 00 ff ff
[ 466.059817] [D] evdi_detect Painter is disconnected
[ 466.059858] [D] evdi_detect Painter is disconnected
[ 466.063430] [D] evdi_painter_crtc_state_notify (dev=0) Notifying crtc state: 0
[ 466.063439] [D] evdi_painter_crtc_state_notify (dev=0) Notifying crtc state: 0
[ 466.066049] [D] evdi_detect (dev=3) Painter is connected
[ 466.066054] [D] evdi_painter_get_edid (dev=3) 00 ff ff
[ 466.067057] [D] evdi_detect (dev=3) Painter is connected
[ 466.067062] [D] evdi_painter_get_edid (dev=3) 00 ff ff
[ 481.457236] [W] evdi_painter_disconnect (dev=3) An unknown connection to ffff8801d4faee00 tries to close us - ignoring
[ 481.475411] [W] evdi_painter_disconnect (dev=0) An unknown connection to ffff8801d4faee00 tries to close us - ignoring
[ 481.493734] [D] evdi_painter_connect (dev=4) Connected with ffff8801d4faee00
[ 481.493738] [D] evdi_painter_connect (dev=4) Edid (3 bytes): 00 ff ff
[ 481.493740] [D] evdi_detect (dev=4) Painter is connected
[ 481.496807] [D] evdi_detect (dev=4) Painter is connected
[ 481.496813] [D] evdi_painter_get_edid (dev=4) 00 ff ff
[ 481.498051] [D] evdi_detect (dev=3) Painter is connected
[ 481.498058] [D] evdi_painter_get_edid (dev=3) 00 ff ff
The screens don't become available until I reboot again. It's quite annoying. I am also having issues with it remember the screen layout so sometimes I have to clear monitors.xml when I use GNOME (KDE, my preferred was completely unusable due to not being able to wrangle this hardware)
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