Description of problem:

The system becomes unresponsive to mouse clicks when an external monitor is connected (along with dmesg errors), and only becomes responsive again once the monitor has been disconnected.


Version-Release number of selected component (if applicable):

kernel-4.2.8-200.fc22.x86_64
xorg-x11-drv-intel-2.99.917-15.20150729.fc22.x86_64
cinnamon-2.6.13-10.fc22.x86_64


How reproducible:

Happens every time.


Steps to Reproduce:
1. Plug in external monitor using VGA cable.

Actual results:

Big delay after plugging in monitor via VGA cable.
Then goes into mirror mode.
The system becomes unresponsive to mouse clicks, i.e. won't register any clicks.
After disconnecting the monitor, the system becomes responsive to mouse clicks again.
Errors appear in dmesg output (see further below).


Expected results:

The system should be responsive regardless of whether the external monitor is connected.

The external monitor should be able to be configured in non-mirror mode.


Additional info:

This is the first time I've tried using an external monitor with this laptop.

System: TOSHIBA Satellite Pro R50-C


$ lspci -k | grep -A 2 VGA 
00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated Graphics (rev 09)
	Subsystem: Toshiba America Info Systems Device 000d
	Kernel driver in use: i915

$ grep driver /var/log/Xorg.0.log
[    40.434] 	X.Org XInput driver : 21.1
[    40.946] (==) Matched intel as autoconfigured driver 0
[    40.946] (==) Matched intel as autoconfigured driver 1
[    40.946] (==) Matched modesetting as autoconfigured driver 2
[    40.946] (==) Matched fbdev as autoconfigured driver 3
[    40.946] (==) Matched vesa as autoconfigured driver 4
[    40.946] (==) Assigned the driver to the xf86ConfigLayout
[    40.958] (II) Loading /usr/lib64/xorg/modules/drivers/intel_drv.so
[    41.084] (II) Loading /usr/lib64/xorg/modules/drivers/modesetting_drv.so
[    41.099] (II) Loading /usr/lib64/xorg/modules/drivers/fbdev_drv.so
[    41.123] (II) Loading /usr/lib64/xorg/modules/drivers/vesa_drv.so
[    41.157] (II) FBDEV: driver for framebuffer: fbdev
[    41.157] (II) VESA: driver for VESA chipsets: vesa
[    41.187] (II) intel(0): Using Kernel Mode Setting driver: i915, version 1.6.0 20150731
[    41.305] (II) intel(0): [DRI2]   DRI driver: i965
[    41.305] (II) intel(0): [DRI2]   VDPAU driver: va_gl
[    42.264] 	ABI class: X.Org XInput driver, version 21.0
[    42.264] (II) Using input driver 'evdev' for 'Power Button'
[    42.264] (II) Using input driver 'evdev' for 'Video Bus'
[    42.265] (II) Using input driver 'evdev' for 'Video Bus'
[    42.265] (II) Using input driver 'evdev' for 'Power Button'
[    42.265] (II) No input driver specified, ignoring this device.
[    42.266] (II) No input driver specified, ignoring this device.
[    42.266] (II) No input driver specified, ignoring this device.
[    42.266] (II) No input driver specified, ignoring this device.
[    42.266] (II) Using input driver 'evdev' for 'TOSHIBA Web Camera - HD'
[    42.267] (II) No input driver specified, ignoring this device.
[    42.267] (II) No input driver specified, ignoring this device.
[    42.267] (II) Using input driver 'evdev' for 'AT Translated Set 2 keyboard'
[    42.269] 	ABI class: X.Org XInput driver, version 21.0
[    42.269] (II) Using input driver 'synaptics' for 'SynPS/2 Synaptics TouchPad'
[    42.293] (II) No input driver specified, ignoring this device.
[    42.294] (II) Using input driver 'evdev' for 'Toshiba input device'


dmesg excerpt:

[ 1228.400303] perf interrupt took too long (2908 > 2500), lowering kernel.perf_event_max_sample_rate to 50000
[16554.121738] ------------[ cut here ]------------
[16554.121752] WARNING: CPU: 3 PID: 1182 at drivers/gpu/drm/drm_irq.c:1232 drm_wait_one_vblank+0x1ba/0x1c0 [drm]()
[16554.121753] vblank wait timed out on crtc 1
[16554.121754] Modules linked in: cmac rfcomm fuse ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack 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 bnep rtsx_usb_ms memstick arc4 uvcvideo videobuf2_vmalloc videobuf2_core videobuf2_memops v4l2_common iwlmvm videodev mac80211 media btusb btrtl btbcm intel_rapl btintel iosf_mbi iwlwifi x86_pkg_temp_thermal bluetooth coretemp iTCO_wdt kvm_intel cfg80211 iTCO_vendor_support snd_soc_rt5640 snd_soc_rl6231 kvm joydev snd_soc_core snd_compress snd_pcm_dmaengine snd_hda_codec_realtek snd_hda_codec_generic
[16554.121784]  snd_hda_codec_hdmi ac97_bus toshiba_haps i2c_designware_platform i2c_designware_core snd_hda_intel toshiba_bluetooth dw_dmac dw_dmac_core toshiba_acpi sparse_keymap rfkill snd_hda_codec snd_hda_core snd_hwdep tpm_infineon snd_seq snd_seq_device snd_soc_sst_acpi snd_pcm lpc_ich mei_me mei shpchp snd_timer snd soundcore tpm_tis tpm nfsd auth_rpcgss nfs_acl lockd grace sunrpc dm_crypt 8021q garp stp llc mrp nouveau i915 rtsx_usb_sdmmc rtsx_usb mxm_wmi ttm crct10dif_pclmul crc32_pclmul i2c_algo_bit drm_kms_helper crc32c_intel drm e1000e serio_raw ptp pps_core wmi sdhci_acpi sdhci fjes video mmc_core
[16554.121813] CPU: 3 PID: 1182 Comm: Xorg Not tainted 4.3.4-200.fc22.x86_64 #1
[16554.121815] Hardware name: TOSHIBA Satellite Pro R50-C/Satellite Pro R50-C, BIOS Version 1.10   04/21/2015
[16554.121816]  0000000000000000 00000000dbe9f39d ffff88022bc33ab0 ffffffff813a625f
[16554.121818]  ffff88022bc33af8 ffff88022bc33ae8 ffffffff810a07c2 ffff8802352e6800
[16554.121820]  0000000000000001 0000000000000000 0000000000000001 ffff88023403d4b8
[16554.121822] Call Trace:
[16554.121826]  [<ffffffff813a625f>] dump_stack+0x44/0x55
[16554.121829]  [<ffffffff810a07c2>] warn_slowpath_common+0x82/0xc0
[16554.121831]  [<ffffffff810a085c>] warn_slowpath_fmt+0x5c/0x80
[16554.121836]  [<ffffffff810e20b3>] ? finish_wait+0x53/0x70
[16554.121843]  [<ffffffffa00beeda>] drm_wait_one_vblank+0x1ba/0x1c0 [drm]
[16554.121845]  [<ffffffff810e2370>] ? wake_atomic_t_function+0x70/0x70
[16554.121866]  [<ffffffffa02084f0>] intel_atomic_commit+0x420/0x13c0 [i915]
[16554.121869]  [<ffffffff8177f264>] ? __ww_mutex_lock_slowpath+0xa4/0x1c0
[16554.121881]  [<ffffffffa00d8405>] ? drm_atomic_check_only+0x215/0x540 [drm]
[16554.121890]  [<ffffffffa00d8767>] drm_atomic_commit+0x37/0x60 [drm]
[16554.121895]  [<ffffffffa012d9ef>] drm_atomic_helper_set_config+0x1bf/0x420 [drm_kms_helper]
[16554.121903]  [<ffffffffa00c67ef>] ? drm_crtc_check_viewport+0x3f/0x100 [drm]
[16554.121911]  [<ffffffffa00c7f92>] drm_mode_set_config_internal+0x62/0x100 [drm]
[16554.121920]  [<ffffffffa00cc2c4>] drm_mode_setcrtc+0x3d4/0x4f0 [drm]
[16554.121926]  [<ffffffffa00bd408>] drm_ioctl+0x138/0x500 [drm]
[16554.121933]  [<ffffffffa00cbef0>] ? drm_mode_setplane+0x1b0/0x1b0 [drm]
[16554.121936]  [<ffffffff8133572c>] ? ioctl_has_perm+0xbc/0xf0
[16554.121938]  [<ffffffff81236bd5>] do_vfs_ioctl+0x295/0x470
[16554.121940]  [<ffffffff813357b0>] ? selinux_file_ioctl+0x50/0xd0
[16554.121942]  [<ffffffff813298e3>] ? security_file_ioctl+0x43/0x60
[16554.121944]  [<ffffffff81236e29>] SyS_ioctl+0x79/0x90
[16554.121946]  [<ffffffff810af7ee>] ? SyS_rt_sigprocmask+0x8e/0xc0
[16554.121949]  [<ffffffff8178182e>] entry_SYSCALL_64_fastpath+0x12/0x71
[16554.121950] ---[ end trace 4f396d20668f2ff4 ]---
[16554.221824] ------------[ cut here ]------------
[16554.221838] WARNING: CPU: 3 PID: 1182 at drivers/gpu/drm/drm_irq.c:1232 drm_wait_one_vblank+0x1ba/0x1c0 [drm]()
[16554.221840] vblank wait timed out on crtc 1