如何查明我的显卡支持哪些分辨率？(AMD HD7750)

Question

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。

有没有办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）？

（注意，这不是为了游戏....3D 性能不重要）

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

Answer 1

经过研究，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。

最简单的查找方法是访问制造商的网站。如此处所列，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。希望这可以帮助！

Answer 2

如果您像我一样想要找到其他兼容的分辨率（低于该最大值），您可以在启动过程中按住左移，然后在 GRUB 显示时按c命令行键。

在提示符下grub >输入命令：videoinfo，它将显示一组与您的显卡兼容的视频分辨率。主要是在不在图形环境中时使用。