[Bug 77436] KDE Konsole very slow scrolling with TearFree and QT graphics system native

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=77436

--- Comment #66 from Ildar Nurislamov <absorbb at gmail.com> ---
(In reply to comment #65)
> As a result of BLT, or with normal acceleration?
As a result of BLT

Btw. Lastest commits made Xorg crash with BLT:
[ 74651.198] (EE) Backtrace:
[ 74651.198] (EE) 0: /usr/bin/Xorg (xorg_backtrace+0x48) [0x58dd48]
[ 74651.198] (EE) 1: /usr/bin/Xorg (0x400000+0x191d89) [0x591d89]
[ 74651.198] (EE) 2: /lib64/libc.so.6 (0x7f700c256000+0x358d0) [0x7f700c28b8d0]
[ 74651.198] (EE) 3: /usr/lib64/xorg/modules/drivers/intel_drv.so
(0x7f7008cb4000+0x5ce6a) [0x7f7008d10e6a]
[ 74651.198] (EE) 4: /usr/lib64/xorg/modules/drivers/intel_drv.so
(0x7f7008cb4000+0x452c2) [0x7f7008cf92c2]
[ 74651.198] (EE) 5: /usr/lib64/xorg/modules/drivers/intel_drv.so
(0x7f7008cb4000+0x45b59) [0x7f7008cf9b59]
[ 74651.198] (EE) 6: /usr/lib64/xorg/modules/drivers/intel_drv.so
(0x7f7008cb4000+0x5abb3) [0x7f7008d0ebb3]
[ 74651.198] (EE) 7: /usr/lib64/xorg/modules/drivers/intel_drv.so
(0x7f7008cb4000+0x5ef37) [0x7f7008d12f37]
[ 74651.198] (EE) 8: /usr/bin/Xorg (0x400000+0x117fd2) [0x517fd2]
[ 74651.198] (EE) 9: /usr/bin/Xorg (0x400000+0x10e1ea) [0x50e1ea]
[ 74651.198] (EE) 10: /usr/bin/Xorg (0x400000+0x3d6ce) [0x43d6ce]
[ 74651.198] (EE) 11: /usr/bin/Xorg (0x400000+0x414ea) [0x4414ea]
[ 74651.198] (EE) 12: /lib64/libc.so.6 (__libc_start_main+0xf5)
[0x7f700c277be5]
[ 74651.198] (EE) 13: /usr/bin/Xorg (0x400000+0x2cb41) [0x42cb41]
[ 74651.198] (EE) 
[ 74651.198] (EE) Segmentation fault at address 0x82c000
[ 74651.198] (EE) 
Fatal server error:
[ 74651.198] (EE) Caught signal 11 (Segmentation fault). Server aborting

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