Обновился.
вот dmesg
[ 533.520013] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
[ 533.520021] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state
Повторяемость: открываем окуляром любой pdf документ, после чего изображение на мониторе застывает секунды на 3, потом отмирает и X начинает жрать процессорное время от самых простых операций
Вот Xorg.0.log
[ 533.017] [mi] EQ overflow continuing. 200 events have been dropped.
[ 533.017]
[ 533.017] Backtrace:
[ 533.017] 0: /usr/bin/X (xorg_backtrace+0x36) [0x51a96a]
[ 533.017] 1: /usr/bin/X (0x400000+0x430cf) [0x4430cf]
[ 533.017] 2: /usr/lib64/xorg/modules/input/evdev_drv.so (0x7f8ce2a3e000+0x5fba) [0x7f8ce2a43fba]
[ 533.017] 3: /usr/bin/X (0x400000+0x61d88) [0x461d88]
[ 533.018] 4: /usr/bin/X (0x400000+0x7c558) [0x47c558]
[ 533.018] 5: /lib64/libpthread.so.0 (0x7f8ce6485000+0x10b80) [0x7f8ce6495b80]
[ 533.018] 6: /lib64/libc.so.6 (ioctl+0x7) [0x7f8ce5409b07]
[ 533.018] 7: /usr/lib64/libdrm.so.2 (drmIoctl+0x20) [0x7f8ce3bc8f62]
[ 533.018] 8: /usr/lib64/xorg/modules/drivers/intel_drv.so (0x7f8ce34c6000+0x32bda) [0x7f8ce34f8bda]
[ 533.018] 9: /usr/lib64/xorg/modules/drivers/intel_drv.so (0x7f8ce34c6000+0x3350d) [0x7f8ce34f950d]
[ 533.018] 10: /usr/lib64/xorg/modules/drivers/intel_drv.so (0x7f8ce34c6000+0x34344) [0x7f8ce34fa344]
[ 533.018] 11: /usr/lib64/xorg/modules/drivers/intel_drv.so (0x7f8ce34c6000+0x343d4) [0x7f8ce34fa3d4]
[ 533.018] 12: /usr/lib64/xorg/modules/drivers/intel_drv.so (0x7f8ce34c6000+0x34657) [0x7f8ce34fa657]
[ 533.018] 13: /usr/lib64/xorg/modules/drivers/intel_drv.so (0x7f8ce34c6000+0x35878) [0x7f8ce34fb878]
[ 533.018] 14: /usr/lib64/xorg/modules/drivers/intel_drv.so (0x7f8ce34c6000+0x4dec5) [0x7f8ce3513ec5]
[ 533.018] 15: /usr/bin/X (BlockHandler+0x36) [0x436974]
[ 533.018] 16: /usr/bin/X (WaitForSomething+0x234) [0x518a5e]
[ 533.018] 17: /usr/bin/X (0x400000+0x33770) [0x433770]
[ 533.018] 18: /usr/bin/X (0x400000+0x25f0b) [0x425f0b]
[ 533.018] 19: /lib64/libc.so.6 (__libc_start_main+0xed) [0x7f8ce534a91d]
[ 533.018] 20: /usr/bin/X (0x400000+0x260dd) [0x4260dd]
[ 533.018]
[ 533.520] (EE) intel(0): Detected a hung GPU, disabling acceleration.
[ 533.520] (EE) intel(0): When reporting this, please include i915_error_state from debugfs and the full dmesg.
[ 533.527] [mi] Increasing EQ size to 512 to prevent dropped events.
[ 533.528] [mi] EQ processing has resumed after 209 dropped events.
[ 533.528] [mi] This may be caused my a misbehaving driver monopolizing the server's resources.
Драйверы пересобирал, иксы откатил на предыдущую версию. С обновлением пришел новый удав - машину перезагрузил.
17:28 razor@localhost /home/razor % qlist -IC x11-driver
x11-drivers/xf86-input-evdev
x11-drivers/xf86-video-intel
17:29 root@localhost /root # lspci | grep -ie gra
00:02.0 VGA compatible controller: Intel Corporation 4 Series Chipset Integrated Graphics Controller (rev 03)
Куда копать, кому багрепортить ?
И, да, дистр - gentoo.
