<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [BYT dsi] WARNING: CPU: 3 PID: 265 at drivers/gpu/drm/drm_irq.c:1130 drm_wait_one_vblank+0x177/0x180()" href="https://bugs.freedesktop.org/show_bug.cgi?id=90469#c51">Comment # 51</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [BYT dsi] WARNING: CPU: 3 PID: 265 at drivers/gpu/drm/drm_irq.c:1130 drm_wait_one_vblank+0x177/0x180()" href="https://bugs.freedesktop.org/show_bug.cgi?id=90469">bug 90469</a> from <a class="email" href="mailto:laszlo.fiat@gmail.com" title="Laszlo Fiat <laszlo.fiat@gmail.com>"> Laszlo Fiat</a> <pre>I found the commit that makes my DSI display go blank (and causes the WARNING) when the KMS loads with kernels newer than linux-next-20151119: <a href="https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/drivers/gpu/drm/i915?id=7383123647566a813692bb37a1389c767ed89158">https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/drivers/gpu/drm/i915?id=7383123647566a813692bb37a1389c767ed89158</a> Revert "drm/i915: skip modeset if compatible for everyone." This commit brings back the i915.fastboot parameter in disabled state, and with that the DSI screen goes blank when KMS loads. Adding i915.fastboot=1 kernel bootline parameter to a recent v4.6 RC4 kernel enables my Teclast X80h tablet to boot with the DSI screen enabled.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>