On Fri, 11 Aug 2023, Thorsten Leemhuis <regressions@xxxxxxxxxxxxx> wrote: > [CCing the i915 maintainers and the dri maintainers] > > Hi, Thorsten here, the Linux kernel's regression tracker. > > On 10.08.23 21:33, Mikhail Rudenko wrote: >> The following is a copy an issue I posted to drm/i915 gitlab [1] two >> months ago. I repost it to the mailing lists in hope that it will help >> the right people pay attention to it. > > Thx for your report. Wonder why Dmitry (who authored a4e771729a51) or > Thomas (who committed it) it didn't look into this, but maybe the i915 > devs didn't forward the report to them. It was [1], but never followed up on, and fell between the cracks. :( BR, Jani. [1] https://lore.kernel.org/r/ZGIraoocR1gLCWjZ@xxxxxxxxx > Let's see if these mails help. Just wondering: does reverting > a4e771729a51 from 6.5-rc5 or drm-tip help as well? > > BTW, there was an earlier report about a problem with a4e771729a51 that > afaics was never addressed, but it might be unrelated. > > https://lore.kernel.org/all/20230328023129.3596968-1-zhouzongmin@xxxxxxxxxx/ > > Ciao, Thorsten > >> After kernel upgrade from 6.2.13 to 6.3 HDMI connector detection is >> broken for me. Issue is 100% reproducible: >> >> 1. Start system as usual with HDMI connected. >> 2. Disconnect HDMI >> 3. Connect HDMI back >> 4. Get "no signal" on display, connector status in sysfs is disconnected >> >> Curiously, running xrandr over ssh like >> >> ssh qnap251.local env DISPLAY=:0 xrandr >> >> makes display come back. drm-tip tip is affected as well (last test >> 2023-08-02). >> >> Bisecting points at a4e771729a51 ("drm/probe_helper: sort out poll_running vs poll_enabled"). >> Reverting that commit on top of 6.3 fixes the issue for me. >> >> System information: >> * System architecture: x86_64 >> * Kernel version: 6.3.arch1 >> * Linux distribution: Arch Linux >> * Machine: QNAP TS-251A, CPU: Intel(R) Celeron(R) CPU N3060 @ 1.60GHz >> * Display connector: single HDMI display >> * dmesg with debug information (captured on drm-tip, following above 4 steps): [2] >> * xrandr output: >> >> Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384 >> DP-1 disconnected (normal left inverted right x axis y axis) >> HDMI-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 708mm x 398mm >> 1920x1080 60.00*+ 50.00 59.94 30.00 25.00 24.00 29.97 23.98 >> 1920x1080i 60.00 50.00 59.94 >> 1360x768 59.80 >> 1280x768 60.35 >> 1280x720 60.00 50.00 59.94 >> 1024x768 75.03 70.07 60.00 >> 832x624 74.55 >> 800x600 75.00 60.32 >> 720x576 50.00 >> 720x480 60.00 59.94 >> 640x480 75.00 60.00 59.94 >> 720x400 70.08 >> DP-2 disconnected (normal left inverted right x axis y axis) >> HDMI-2 disconnected (normal left inverted right x axis y axis)``` >> >> I'm willing to provide additional information and/or test fixes. >> >> [1] https://gitlab.freedesktop.org/drm/intel/-/issues/8451 >> [2] https://gitlab.freedesktop.org/drm/intel/uploads/fda7aff0b13ef20962856c2c7be51544/dmesg.txt >> >> #regzbot introduced: a4e771729a51 >> >> -- >> Best regards, >> Mikhail Rudenko -- Jani Nikula, Intel Open Source Graphics Center
