The most common cause of a mistaken default resolution is the kernel
randomly not getting enough bandwidth to use the full resolution. This
happens if there is an imperfection in the display cable or its
connections. So I usually recommend replacing the cables between the
laptop and the monitors. For HDMI, try to get an "HDMI 2.1" cable. For
USB-C, try to get "Thunderbolt" cables.
** Tags added: multimonitor noble
** Package changed: gnome-shell (Ubuntu) => ubuntu
** Changed in: ubuntu
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/2100482
Title:
2nd screen display resolution fails on resume from screen blanking
Status in Ubuntu:
Incomplete
Bug description:
This bug occurs with both X11 and Wayland. I currently have Wayland
enabled, so I'll file from that perspective.
Symptom: When the system recovers from having it's screens blanked,
the Dell 19" (monitor 0) comes on at Standard VGA resolution. If I
power the monitor down and back up again, it's recovers the correct
settings.
Monitors: 3
0: +*DP-2 1440/420x900/260+1440+0 DP-2
1: +DP-1 1440/410x900/260+0+0 DP-1
2: +eDP-1 1536/310x864/170+2880+36 eDP-1
0 is a Dell 19"
1 is a Benq 19"
2 is the builtin laptop monitor
The are physically arranged from left to right: 1, 0, 2
I have screen blanking set to 15 minutes.
# System Details Report
---
## Report details
- **Date generated:** 2025-02-27 13:22:46
## Hardware Information:
- **Hardware Model:** ASUSTeK COMPUTER INC.
ZenBook UX425EA_UX425EA
- **Memory:** 16.0 GiB
- **Processor:** 11th Gen Intel® Core™
i7-1165G7 × 8
- **Graphics:** Intel® Xe Graphics (TGL
GT2)
- **Disk Capacity:** 512.1 GB
## Software Information:
- **Firmware Version:** UX425EA.319
- **OS Name:** Ubuntu 24.04.2 LTS
- **OS Build:** (null)
- **OS Type:** 64-bit
- **GNOME Version:** 46
- **Windowing System:** Wayland
- **Kernel Version:** Linux 6.11.0-17-generic
I'll now wait for a screen blank to occur and then attach the
/var/log/syslog file for details.
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