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Bug 3098 - [Focal] KControl DPMS apply corrupts colors and fails to apply
Summary: [Focal] KControl DPMS apply corrupts colors and fails to apply
Status: NEW
Alias: None
Product: TDE
Classification: Unclassified
Component: ubuntu (show other bugs)
Version: R14.0.x [Trinity]
Hardware: Other Linux
: P5 normal
Assignee: Timothy Pearson
URL:
Depends on:
Blocks:
 
Reported: 2020-04-17 09:50 CDT by Felix Miata
Modified: 2020-04-17 09:50 CDT (History)
1 user (show)

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Description Felix Miata 2020-04-17 09:50:30 CDT 
Original summary:
[Focal] KControl DPMS apply corrupts colors and fails to apply

To reproduce:
1-install Focal minimal
2-install tdebase-trinity, tdm-trinity and selected other trinity packages
3-open Trinity Control Center
4-select System Administration
5-select Monitor & Display
6-select Power Management tab
7-type a 2 in between 1 and 0 in the Enable standby after box
8-click outside the input area and watch all three boxes update to 120 minutes
9-click Apply
10-click Accept in the confirmation popup
11-close KControl
12-close the session
13-log back in
14-goto 3

Actual behavior:
1-screen briefly blanks
2-screen colors mode changes from 24bit to very likely 8bit mode (very poor)
3-popup window appears for confirming or reverting
4-barely legible text everywhere until logout
5-120 minutes "applied" to each have reverted to 10 minutes each
6-screen blanks after only 10 minutes inactivity

Expected behavior:
1-colors and text stay normal
2-120 minutes have applied, and persist between sessions
3-screen maintains state up to 120 minutes of inactivity

# inxi -bxx
System:    Host: ab85m Kernel: 5.4.0-24-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 Desktop: Trinity R14.0.8 tk: Qt 3.5.0
           wm: Twin dm: TDM Distro: Ubuntu 20.04 LTS (Focal Fossa)
Machine:   Type: Desktop System: Seneca product: PRO430780 v: N/A serial: fooy
           Mobo: ASUSTeK model: B85M-E v: Rev X.0x serial: bar BIOS: American Megatrends v: 3602 date: 04/04/2018
CPU:       Dual Core: Intel Pentium G3220 type: MCP arch: Haswell speed: 800 MHz min/max: 800/3000 MHz
Graphics:  Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics vendor: ASUSTeK driver: i915 v: kernel
           bus ID: 00:02.0 chip ID: 8086:0402
           Display: x11 server: X.Org 1.20.8 driver: modesetting unloaded: fbdev,vesa resolution: 1920x1200~60Hz
           OpenGL: renderer: Mesa DRI Intel HD Graphics (HSW GT1) v: 4.5 Mesa 20.0.4 compat-v: 3.0 direct render: Yes
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: ASUSTeK P8 series driver: r8169 v: kernel
           port: e000 bus ID: 03:00.0 chip ID: 10ec:8168
Drives:    Local Storage: total: 298.09 GiB used: 74.45 GiB (25.0%)
Info:      Processes: 165 Uptime: 48m Memory: 15.17 GiB used: 346.8 MiB (2.2%) Init: systemd v: 245 runlevel: 5 Compilers:
           gcc: N/A Shell: bash v: 5.0.16 running in: konsole inxi: 3.0.38

KSnapshot captures only what the screen should look like, not the corrupted state.