<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - intermittent display on kaby lake/i915 from kernel 4.19 onwards" href="https://bugs.freedesktop.org/show_bug.cgi?id=109215#c11">Comment # 11</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - intermittent display on kaby lake/i915 from kernel 4.19 onwards" href="https://bugs.freedesktop.org/show_bug.cgi?id=109215">bug 109215</a> from <a class="email" href="mailto:ville.syrjala@linux.intel.com" title="Ville Syrjala <ville.syrjala@linux.intel.com>"> Ville Syrjala</a> <pre>(In reply to masterpatricko from <a href="show_bug.cgi?id=109215#c6">comment #6</a>) > I am able to reproduce with 5.0-rc3 drm-tip from git > 08f37be937e0f3c2904d4250b0858e9ea9d72623 . > i915.fastboot=1 gives stable (within observation time) display, while > i915.fastboot=0 exhibits intermittent display. > Kernel 4.18 is still working in all cases. > Also seems dependent on whether the system is on AC power, on battery the > display is mostly working with only occasional blanking, while on AC the > display is mostly black with only very occasional moments showing the system > is actually working. > > Previous attachment is dmesg shortly after booting 5.0-rc3 from drm-tip (and > with drm.debug=0x1e log_buf_len=4M) with fastboot=0. The problem was > occurring as this log was saved. > > Issue is quite reproducible so let me know if more logs (or "good" logs with > fastboot=1) would help. Output from intel_watermark (from git://anongit.freedesktop.org/xorg/app/intel-gpu-tools) for the fastboot=0 flickering case and the fastboot=1 non-flickering case would be nice.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>