Since I updated the linux kernel to version 4.5 RC3, I cannot reproduce the error. So it seems solved with kernel 4.5 RC3.
Linux portable-londe 4.5.0-040500rc3-generic #201602071930 SMP Mon Feb 8 00:34:43 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux System information: Dell Inc. Inspiron 5558 with Ubuntu 14.04.3 LTS 64 bits - 8GB RAM - Bios A07 - Intel® Core™ i5-5200U CPU @ 2.20GHz × 4 - Intel® HD Graphics 5500 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1542934 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1542934/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
