我使用 ubuntu 桌面大约 12 年了，使用的是已发布的 LTS。并使用外接显示器 (Acer G195HOV) vga 端口连接到我的笔记本电脑 hp2540p。它在 ubuntu 桌面 16.04 LTS 中运行良好，升级到 ubuntu 20.04 LTS 后“运行了一段时间”。内核更新到版本 5.10 后，外接显示器停止工作......空白屏幕。
仅供参考：我目前正在使用带有内核 5.15 的 ubuntu 20.04。
jerry@hp-2540p:~$ hostnamectl
Static hostname: hp-2540p
Icon name: computer-laptop
Chassis: laptop
Machine ID: de4b56ef6180e8fc7e641c9d5fddb479
Boot ID: fb02c732e3cf4de2bd716259ecfdee56
Operating System: Ubuntu 20.04.4 LTS
Kernel: Linux 5.15.0-17-generic
Architecture: x86-64
jerry@hp-2540p:~$ echo $XDG_SESSION_TYPE
wayland
jerry@hp-2540p:~$ sudo lspci -v
[sudo] password for jerry:
00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 02)
Subsystem: Hewlett-Packard Company Core Processor DRAM Controller
Flags: bus master, fast devsel, latency 0
Capabilities: [e0] Vendor Specific Information: Len=0c <?>
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02) (prog-if 00 [VGA controller])
DeviceName: 32
Subsystem: Hewlett-Packard Company Core Processor Integrated Graphics Controller
Flags: bus master, fast devsel, latency 0, IRQ 29
Memory at d0000000 (64-bit, non-prefetchable) [size=4M]
Memory at c0000000 (64-bit, prefetchable) [size=256M]
I/O ports at 5058 [size=8]
Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2
Capabilities: [a4] PCI Advanced Features
Kernel driver in use: i915
Kernel modules: i915
00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)
Subsystem: Hewlett-Packard Company 5 Series/3400 Series Chipset HECI Controller
Flags: bus master, fast devsel, latency 0, IRQ 30
Memory at d4724000 (64-bit, non-prefetchable) [size=16]
Capabilities: [50] Power Management version 3
Capabilities: [8c] MSI: Enable+ Count=1/1 Maskable- 64bit+
Kernel driver in use: mei_me
Kernel modules: mei_me
00:16.3 Serial controller: Intel Corporation 5 Series/3400 Series Chipset KT Controller (rev 06) (prog-if 02 [16550])
Subsystem: Hewlett-Packard Company 5 Series/3400 Series Chipset KT Controller
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 17
I/O ports at 5050 [size=8]
Memory at d472b000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [c8] Power Management version 3
Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+
Kernel driver in use: serial
00:19.0 Ethernet controller: Intel Corporation 82577LM Gigabit Network Connection (rev 05)
Subsystem: Hewlett-Packard Company 82577LM Gigabit Network Connection
Flags: bus master, fast devsel, latency 0, IRQ 27
Memory at d4700000 (32-bit, non-prefetchable) [size=128K]
Memory at d472a000 (32-bit, non-prefetchable) [size=4K]
I/O ports at 5020 [size=32]
Capabilities: [c8] Power Management version 2
Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [e0] PCI Advanced Features
Kernel driver in use: e1000e
Kernel modules: e1000e
00:1a.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) (prog-if 20 [EHCI])
Subsystem: Hewlett-Packard Company 5 Series/3400 Series Chipset USB2 Enhanced Host Controller
Flags: bus master, medium devsel, latency 0, IRQ 16
Memory at d4729000 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 2
Capabilities: [58] Debug port: BAR=1 offset=00a0
Capabilities: [98] PCI Advanced Features
Kernel driver in use: ehci-pci
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05)
Subsystem: Hewlett-Packard Company 5 Series/3400 Series Chipset High Definition Audio
Flags: bus master, fast devsel, latency 0, IRQ 32
Memory at d4720000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [50] Power Management version 2
Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
Capabilities: [100] Virtual Channel
Capabilities: [130] Root Complex Link
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 24
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: [disabled]
Memory behind bridge: d4600000-d46fffff [size=1M]
Prefetchable memory behind bridge: [disabled]
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: Hewlett-Packard Company 5 Series/3400 Series Chipset PCI Express Root Port 1
Capabilities: [a0] Power Management version 2
Kernel driver in use: pcieport
00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 05) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 25
Bus: primary=00, secondary=02, subordinate=42, sec-latency=0
I/O behind bridge: 00003000-00004fff [size=8K]
Memory behind bridge: d0600000-d45fffff [size=64M]
Prefetchable memory behind bridge: 00000000d4900000-00000000d4afffff [size=2M]
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: Hewlett-Packard Company 5 Series/3400 Series Chipset PCI Express Root Port 2
Capabilities: [a0] Power Management version 2
Kernel driver in use: pcieport
00:1c.3 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 4 (rev 05) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 26
Bus: primary=00, secondary=43, subordinate=43, sec-latency=0
I/O behind bridge: [disabled]
Memory behind bridge: d0500000-d05fffff [size=1M]
Prefetchable memory behind bridge: [disabled]
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: Hewlett-Packard Company 5 Series/3400 Series Chipset PCI Express Root Port 4
Capabilities: [a0] Power Management version 2
Kernel driver in use: pcieport
00:1d.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) (prog-if 20 [EHCI])
Subsystem: Hewlett-Packard Company 5 Series/3400 Series Chipset USB2 Enhanced Host Controller
Flags: bus master, medium devsel, latency 0, IRQ 20
Memory at d4728000 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 2
Capabilities: [58] Debug port: BAR=1 offset=00a0
Capabilities: [98] PCI Advanced Features
Kernel driver in use: ehci-pci
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5) (prog-if 01 [Subtractive decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=44, subordinate=45, sec-latency=64
I/O behind bridge: 00002000-00002fff [size=4K]
Memory behind bridge: d0400000-d04fffff [size=1M]
Prefetchable memory behind bridge: [disabled]
Capabilities: [50] Subsystem: Hewlett-Packard Company 82801 Mobile PCI Bridge
00:1f.0 ISA bridge: Intel Corporation QM57 Chipset LPC Interface Controller (rev 05)
Subsystem: Hewlett-Packard Company QM57 Chipset LPC Interface Controller
Flags: bus master, medium devsel, latency 0
Capabilities: [e0] Vendor Specific Information: Len=10 <?>
Kernel driver in use: lpc_ich
Kernel modules: lpc_ich
00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 6 port SATA AHCI Controller (rev 05) (prog-if 01 [AHCI 1.0])
Subsystem: Hewlett-Packard Company 5 Series/3400 Series Chipset 6 port SATA AHCI Controller
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 28
I/O ports at 5048 [size=8]
I/O ports at 5064 [size=4]
I/O ports at 5040 [size=8]
I/O ports at 5060 [size=4]
I/O ports at 5000 [size=32]
Memory at d4727000 (32-bit, non-prefetchable) [size=2K]
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [70] Power Management version 3
Capabilities: [a8] SATA HBA v1.0
Capabilities: [b0] PCI Advanced Features
Kernel driver in use: ahci
Kernel modules: ahci
00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 05)
Subsystem: Hewlett-Packard Company 5 Series/3400 Series Chipset Thermal Subsystem
Flags: bus master, fast devsel, latency 0, IRQ 18
Memory at d4726000 (64-bit, non-prefetchable) [size=4K]
Capabilities: [50] Power Management version 3
Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
Kernel driver in use: intel ips
Kernel modules: intel_ips
43:00.0 Network controller: Intel Corporation Centrino Advanced-N 6200 (rev 35)
DeviceName: WLAN
Subsystem: Intel Corporation Centrino Advanced-N 6200 2x2 AGN
Flags: bus master, fast devsel, latency 0, IRQ 31
Memory at d0500000 (64-bit, non-prefetchable) [size=8K]
Capabilities: [c8] Power Management version 3
Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [e0] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Device Serial Number 00-23-14-ff-ff-7a-5e-f4
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
44:06.0 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller (rev 06) (prog-if 10 [OHCI])
Subsystem: Hewlett-Packard Company R5C832 IEEE 1394 Controller
Flags: bus master, medium devsel, latency 64, IRQ 20
Memory at d0401000 (32-bit, non-prefetchable) [size=2K]
Capabilities: [dc] Power Management version 2
Kernel driver in use: firewire_ohci
Kernel modules: firewire_ohci
44:06.1 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 25)
Subsystem: Hewlett-Packard Company R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter
Flags: bus master, medium devsel, latency 64, IRQ 22
Memory at d0403000 (32-bit, non-prefetchable) [size=256]
Capabilities: [80] Power Management version 2
Kernel driver in use: sdhci-pci
Kernel modules: sdhci_pci
44:06.2 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev bb)
Subsystem: Hewlett-Packard Company RL5c476 II
Flags: bus master, medium devsel, latency 168, IRQ 22
Memory at d0400000 (32-bit, non-prefetchable) [size=4K]
Bus: primary=44, secondary=45, subordinate=45, sec-latency=176
Memory window 0: d8000000-dbffffff (prefetchable)
Memory window 1: dc000000-dfffffff
I/O window 0: 00002000-000020ff
I/O window 1: 00002400-000024ff
16-bit legacy interface ports at 0001
Capabilities: [dc] Power Management version 2
Kernel driver in use: yenta_cardbus
Kernel modules: yenta_socket
ff:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02)
Subsystem: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers
Flags: bus master, fast devsel, latency 0
ff:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02)
Subsystem: Intel Corporation Core Processor QuickPath Architecture System Address Decoder
Flags: bus master, fast devsel, latency 0
ff:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02)
Subsystem: Intel Corporation Core Processor QPI Link 0
Flags: bus master, fast devsel, latency 0
ff:02.1 Host bridge: Intel Corporation 1st Generation Core i3/5/7 Processor QPI Physical 0 (rev 02)
Subsystem: Intel Corporation 1st Generation Core i3/5/7 Processor QPI Physical 0
Flags: bus master, fast devsel, latency 0
ff:02.2 Host bridge: Intel Corporation 1st Generation Core i3/5/7 Processor Reserved (rev 02)
Subsystem: Intel Corporation 1st Generation Core i3/5/7 Processor Reserved
Flags: bus master, fast devsel, latency 0
ff:02.3 Host bridge: Intel Corporation 1st Generation Core i3/5/7 Processor Reserved (rev 02)
Subsystem: Intel Corporation 1st Generation Core i3/5/7 Processor Reserved
Flags: bus master, fast devsel, latency 0
jerry@hp-2540p:~$
jerry@hp-2540p:~$ sudo lshw -c video
[sudo] password for jerry:
*-display
description: VGA compatible controller
product: Core Processor Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 02
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list
configuration: driver=i915 latency=0
resources: irq:29 memory:d0000000-d03fffff memory:c0000000-cfffffff ioport:5058(size=8) memory:c0000-dffff
jerry@hp-2540p:~$ xrandr --verbose
Screen 0: minimum 16 x 16, current 2646 x 800, maximum 32767 x 32767
XWAYLAND0 connected 1280x800+0+0 (0x543) normal (normal left inverted right x axis y axis) 260mm x 160mm
Identifier: 0x21
Timestamp: 110906
Subpixel: unknown
Gamma: 1.0:1.0:1.0
Brightness: 0.0
Clones:
CRTC: 0
CRTCs: 0
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
non-desktop: 0
supported: 0, 1
1280x800 (0x543) 83.750MHz -HSync +VSync *current +preferred
h: width 1280 start 1352 end 1480 total 1680 skew 0 clock 49.85KHz
v: height 800 start 803 end 809 total 831 clock 59.99Hz
XWAYLAND1 connected 1366x768+1280+0 (0x546) normal (normal left inverted right x axis y axis) 410mm x 230mm
Identifier: 0x545
Timestamp: 110906
Subpixel: unknown
Gamma: 1.0:1.0:1.0
Brightness: 0.0
Clones:
CRTC: 1
CRTCs: 1
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
non-desktop: 0
supported: 0, 1
1366x768 (0x546) 84.500MHz -HSync +VSync *current +preferred
h: width 1366 start 1431 end 1567 total 1776 skew 0 clock 47.58KHz
v: height 768 start 771 end 781 total 798 clock 59.62Hz
jerry@hp-2540p:~$
仍然不清楚如何解决这个问题：
Bug #1971075 带有内置英特尔显卡的外接显示器 vga 端口无法与 ubuntu 20.04 wayland 配合使用
任何人？
感谢您的关注。