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Hello,
when I lock my screen, the display is going into standby mode. Sometimes, but not always, the display resolution is different when I try to unlock the screen again. The corresponding log looks like:
gnome-shell[1316]: Failed to use stored monitor configuration: Invalid mode 2560x1440 (59,950550) for monitor 'DEL DELL U2715H'
/usr/lib/gdm/gdm-x-session[1269]: (II) intel(0): resizing framebuffer to 2048x1152
/usr/lib/gdm/gdm-x-session[1269]: (II) intel(0): switch to mode 2048x1152@60.0 on DP1 using pipe 0, position (0, 0), rotation normal, reflection none
Turning the display off and on again fixes the issue:
/usr/lib/gdm/gdm-x-session[1269]: (II) intel(0): EDID vendor "DEL", prod id 53350
/usr/lib/gdm/gdm-x-session[1269]: (II) intel(0): Using hsync ranges from config file
/usr/lib/gdm/gdm-x-session[1269]: (II) intel(0): Using vrefresh ranges from config file
/usr/lib/gdm/gdm-x-session[1269]: (II) intel(0): Printing DDC gathered Modelines:
/usr/lib/gdm/gdm-x-session[1269]: (II) intel(0): Modeline "2560x1440"x0.0 241.50 2560 2608 2640 2720 1440 1443 1448 1481 +hsync -vsync (88.8 kHz eP)
/usr/lib/gdm/gdm-x-session[1269]: (II) intel(0): Modeline "1920x1080"x0.0 148.50 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync (67.5 kHz e)
...
Could this be related to a recent kernel upgrade?
lspci reports the VGA device as:
Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller (rev 06)
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If the problem arises after upgrade, try to reinstall the driver video.
Last edited by brainfucksec (2017-10-14 06:56:34)
--= [ |<!55 ]=--
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As a workaround try adding /etc/X11/xorg.conf.d/11-monitor.conf
Section "Monitor"
Identifier "DP1"
Modeline "2560x1440_60.00" 241.50 2560 2608 2640 2720 1440 1443 1448 1481 +hsync -vsync
Option "PreferredMode" "2560x1440_60.00"
EndSection
It smells as if gnome tries to be smart and updates the resolution when leaving dpms but the monitor hasn't (always) woken up and doesn't respond to EDID/DDC queries
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Thanks for the suggestion with the hardcoded config, but it did not work. Now the display stays black and I have to reboot.
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"Stays black" after the lock or right at booting?
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After the lock. Switching to the console is not possible. There are no suspicious entries in the journal when that happens.
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Can you ssh into that machine?
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Yes, ssh is possible. But there are no helpful log messages and restarting gdm does not work. So I have to reboot.
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export DISPLAY=:0
xrandr -q
... maybe you can "revive" setting a mode?
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New information: The issue is not related to Xorg. I switched to Wayland and here the same problem occurs. So perhaps it is caused by Gnome?
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"triggered" - maybe. probably. caused? rather not. Check dmesg for error messages, notably of the i915 module.
Also try passing i915.enable_rc6=0 (or alter it at runtime, see https://wiki.archlinux.org/index.php/In … ble_rc6.29 )
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i915.enable_rc6=0 did not change anything.
dmesg does not report any warnings with the i915 module, even when setting i915.verbose_state_checks=1. The only thing I see is when the USB hub of the display disappears and appears again when going in and out of standby.
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I think is a problem of GDM try to reinstall it
--= [ |<!55 ]=--
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I think is a problem of GDM try to reinstall it
I just installed the latest updates for GDM, but the problem persists.
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The issue is not related to Xorg. I switched to Wayland and here the same problem occurs. So perhaps it is caused by Gnome?
"triggered" - maybe. probably. caused? rather not.
It seems you were right here. Today I tried Cinnamon with its own screensaver and the problem is exactly the same.
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Cinnamon basically is gnome.
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