Description of problem:

The default sna acceleration causes improper rendering. For example, when typing away in a mate-terminal, the typed text will only appear after a certain line width has been reached, tab completion triggered, or Enter pressed.

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

2.99.917

How reproducible:

100% in a MATE+xmonad environment

Steps to Reproduce:
1. Login to a xmonad-mate session, as provided by the xmonad-mate package.
2. Open a mate-terminal window
3. Type anything

Actual results:

The typed text only appears after a certain line width has been reached, tab completion triggered, or Enter pressed.

Expected results:

The typed text appears immediately.

Additional info:

This seems to be related to BZ1093282.

Relevant lspci -vv output:

00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06) (prog-if 00 [VGA controller])
	Subsystem: Lenovo Device 221e
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 29
	Region 0: Memory at b1400000 (64-bit, non-prefetchable) [size=4M]
	Region 2: Memory at a0000000 (64-bit, prefetchable) [size=256M]
	Region 4: I/O ports at 5000 [size=64]
	[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
	Capabilities: <access denied>
	Kernel driver in use: i915
	Kernel modules: i915

Also note that switching to uxa acceleration fixes the issue. Specifically, the workaround is to create a /etc/X11/xorg.conf.d/20-intel.conf file with the following contents:

Section "Device"                                                                                                    
        Identifier  "card0"
        Driver      "intel"
        Option      "AccelMethod"  "uxa"
EndSection