<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [GLK] [IGT] testdisplay -a shows corruption on HDMI 4k display" href="https://bugs.freedesktop.org/show_bug.cgi?id=100440#c26">Comment # 26</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [GLK] [IGT] testdisplay -a shows corruption on HDMI 4k display" href="https://bugs.freedesktop.org/show_bug.cgi?id=100440">bug 100440</a> from <a class="email" href="mailto:shashank.sharma@intel.com" title="shashank.sharma@intel.com <shashank.sharma@intel.com>"> shashank.sharma@intel.com</a> <pre>I was able to get a proper modeset on the said mode (25x16) on same monitor, using both Mint GUI as well as testdisplay. There are 3 files attached with this message: - Modeset 25x14 using Mint-GUI: Modeset 25x14 with GUI - Modeset 25x14 using testdisplay: Modeset 25x14 with testdisplay The command used in testdisplay was: ./testdisplay -f 241.5,2560,2608,2640,2720,1440,1443,1448,1481 I also confirmed that: - It was 12 BPC modeset - The scrambling and high tmds clock was enabled during this modeset. [ 1145.592443] [drm:intel_hdmi_compute_config] Shashank: picking bpc to 12 for HDMI output [ 1145.593176] [drm:intel_hdmi_handle_sink_scrambling] Shashank: Setting sink scrambling=0 tmds=0 for enc:DDI C connector:HDMI-A-2 [ 1145.924969] [drm:intel_ddi_enable_transcoder_func] *ERROR* Shashank: Set source scrambling [ 1145.934277] [drm:intel_hdmi_handle_sink_scrambling] Shashank: Setting sink scrambling=1 tmds=1 for enc:DDI C connector:HDMI-A-2 The only difference is, I was using an old intel_drv.so library. This lib comes with X package I guess, as its location is (/usr/lib/xorg/modules/drivers/intel_drv.so) With the latest version of this libraray, I was not even getting the desktop on Mint-GUI, there was a crash during X modeset. I attached X with GDB, and saw the crash in this library. Then I used older version of this library, and with this I am not getting any crash. Library is also attached for further reference. - Shashank</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>