我目前正在运行 AMD HD7750 三头显卡，并且正在考虑将一台显示器升级为 4K 屏幕。
有没有什么方法可以确定显卡上每个接口可以支持的最大分辨率（或分辨率组合）？
（请注意，这不是用于游戏... 3D 性能并不令人担忧）
查找卡的详细信息很容易：
damien@damien-desktop:~$ sudo lshw -C video
[sudo] password for damien:
PCI (sysfs)
*-display
description: VGA compatible controller
product: Cape Verde PRO [Radeon HD 7750 / R7 250E]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:01:00.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver=radeon latency=0
resources: irq:52 memory:d0000000-dfffffff memory:fde80000-fdebffff ioport:de00(size=256) memory:fde00000-fde1ffff
正如通过 lspci 找到一个详细信息一样：
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde PRO [Radeon HD 7750 / R7 250E] (prog-if 00 [VGA controller])
Subsystem: PC Partner Limited / Sapphire Technology Device e213
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 4 bytes
Interrupt: pin A routed to IRQ 52
Region 0: Memory at d0000000 (64-bit, prefetchable) [size=256M]
Region 2: Memory at fde80000 (64-bit, non-prefetchable) [size=256K]
Region 4: I/O ports at de00 [size=256]
[virtual] Expansion ROM at fde00000 [disabled] [size=128K]
Capabilities: [48] Vendor Specific Information: Len=08 <?>
Capabilities: [50] Power Management version 3
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1+,D2+,D3hot+,D3cold-)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [58] Express (v2) Legacy Endpoint, MSI 00
DevCap: MaxPayload 256 bytes, PhantFunc 0, Latency L0s <4us, L1 unlimited
ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
MaxPayload 128 bytes, MaxReadReq 512 bytes
DevSta: CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr- TransPend-
LnkCap: Port #0, Speed 8GT/s, Width x16, ASPM L0s L1, Exit Latency L0s <64ns, L1 <1us
ClockPM- Surprise- LLActRep- BwNot-
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 5GT/s, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
DevCap2: Completion Timeout: Not Supported, TimeoutDis-, LTR-, OBFF Not Supported
DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled
LnkCtl2: Target Link Speed: 8GT/s, EnterCompliance- SpeedDis-
Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
Compliance De-emphasis: -6dB
LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, EqualizationPhase1-
EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest-
Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Address: 00000000fee3f00c Data: 4192
Capabilities: [100 v1] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
Capabilities: [150 v2] Advanced Error Reporting
UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
AERCap: First Error Pointer: 00, GenCap+ CGenEn- ChkCap+ ChkEn-
Capabilities: [270 v1] #19
Kernel driver in use: radeon
答案1
研究完这个问题后，我找不到任何可以显示显卡支持的最大分辨率的终端命令。
最简单的方法是访问制造商的网站。如所列这里，根据规格，AMD Radeon HD 7750 显卡支持的最大分辨率为4096x2160 @ 60 Hz per display，因此您应该能够升级到 4k 显示器。希望这能有所帮助！
答案2
如果您和我一样，想要找到其他兼容的分辨率（低于最大值），您可以在启动期间按住左移键，当 GRUB 出现时按下c命令行键。
在grub >提示符下输入命令：videoinfo它将显示一组与您的显卡兼容的视频分辨率。主要用于非图形环境中。