[Bug 96705] New: [Intel HD 5500] keyboard lag in gnome-terminal

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96705

            Bug ID: 96705
           Summary: [Intel HD 5500] keyboard lag in gnome-terminal
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: jakubkucharski97 at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

Created attachment 124754
  --> https://bugs.freedesktop.org/attachment.cgi?id=124754&action=edit
dmesg output

After a while of typing stuff in gnome-terminal there is a lag. Just like
described by a guy here[1], except that it also happens in vim (for the prompt
displayed at the bottom when starting a command with ':'). So I'll just quote:

"I'm experiencing a serious delay in keyboard input in all terminals I have,
except xterm.  gnome-terminal, terminator are the ones with the same issue.

Well, anything that is a letter key that is...  Backspace, arrow keys, enter
actually function instantly as expected.  But entering anything such as:

$ asddkdalsdlasdlasd
$ ls -l
$ nano ~/.profile

Are all delayed by 2 to 5 seconds before showing partially, or all of it."

The guys from this forum suggested switching from SNA to UXA. It does seem to
fix that, but I'm not really sure, because I have to type for a longer while to
reproduce the bug.

Chipset: Intel HD 5500
System architecture: x86_64
xserver version: 1.18.3
xf86-video-intel version: 2.99.917
Kernel version: 4.6.3-1-ARCH
Linux distro: Arch Linux
Machine: Dell Latitude 3450

[1] https://bbs.archlinux.org/viewtopic.php?id=199346

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