This bug affects me on utopic, same as previous comment
sudo lspci -v
00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated
Graphics (rev 09) (prog-if 00 [VGA controller])
Subsystem: Lenovo Device 5041
Flags: bus master, fast devsel, latency 0, IRQ 61
Memory at e0000000 (64-bit, non-prefetchable) [size=16M]
Memory at c0000000 (64-bit, prefetchable) [size=512M]
I/O ports at 3000 [size=64]
Expansion ROM at <unassigned> [disabled]
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2
Capabilities: [a4] PCI Advanced Features
Kernel driver in use: i915
uname -a
Linux tim-Yoga 3.16.0-34-generic #47-Ubuntu SMP Fri Apr 10 18:02:58 UTC 2015
x86_64 x86_64 x86_64 GNU/Linux
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https://bugs.launchpad.net/bugs/1342675
Title:
Random characters in screen text suddenly disappear
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