我最近在 HTPC 上從 Unity 切換到 Xfce，並全新安裝了 Xubuntu。
現在，每當我關閉電視並讓它靜置一段時間時，當我重新打開電視時，就沒有視訊訊號，即使在鍵盤/滑鼠輸入後也沒有訊號。 （實際上我在 Debian 上運行 Xfce 的筆記型電腦上也有同樣的問題）。作業系統正在接收我的輸入，但顯示器/電視從未收到任何訊號。
我已經閱讀並嘗試了許多類似問題的解決方案，但與我的確切問題相關的問題似乎尚未解決。
到目前為止，我唯一能做的就是遠端重新啟動 lightdm（如果這是我唯一的解決方案，我可能可以將其設定為鍵盤快捷鍵），但這不是真正的解決方案。
關於我的 HTPC
作業系統:
$ cat /etc/*-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04.3 LTS"
NAME="Ubuntu"
VERSION="14.04.3 LTS, Trusty Tahr"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 14.04.3 LTS"
VERSION_ID="14.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
硬體:
$ lspci
00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Root Complex
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Kabini [Radeon HD 8400]
00:01.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Device 9840
00:02.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 0
00:02.3 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Functions 5:1
00:02.4 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Functions 5:1
00:02.5 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Functions 5:1
00:10.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB XHCI Controller (rev 01)
00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] (rev 40)
00:12.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller (rev 39)
00:12.2 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller (rev 39)
00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller (rev 39)
00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller (rev 39)
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 3a)
00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD] FCH Azalia Controller (rev 02)
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 11)
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 0
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 1
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 2
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 3
00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 4
00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 5
01:00.0 Audio device: Creative Labs Device 0012 (rev 01)
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 11)
03:00.0 USB controller: ASMedia Technology Inc. Device 1142
$ lspci -vnn | grep VGA -A 10
00:01.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Kabini [Radeon HD 8400] [1002:9830] (prog-if 00 [VGA controller])
Subsystem: ASUSTeK Computer Inc. Device [1043:8623]
Flags: bus master, fast devsel, latency 0, IRQ 42
Memory at c0000000 (64-bit, prefetchable) [size=256M]
Memory at d0000000 (64-bit, prefetchable) [size=8M]
I/O ports at f000 [size=256]
Memory at feb00000 (32-bit, non-prefetchable) [size=256K]
Expansion ROM at feb40000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: radeon
電視透過 HDMI 連接。
在我的筆記型電腦上，我卸載了 xfce4-power-manager 和 light-locker，所以現在它永遠不會休眠，顯示器始終打開。這對電池/電費來說很困難，但至少當我離開太多分鐘時，我不會失去任何打開的東西。
在 HTPC 上，我現在可以刪除它們，但我不喜歡沒有電源管理，我應該嘗試使用 gnome-screensaver 和 gnome-power-manager 嗎？