QHD (2560x1440) not being used/supported on Intel UHD Graphics 750
I would like to use QHD resolution (2560x1440) with my shiny new computer and display. That resolution works if I boot Windows 10 (cough).
What do I need to do to use that resolution in Linux?
I first tried openSUSE 15.3 (kernel 5.3.18-59.19-default) then I build a v5.14 kernel and tried that. Both of them max out at FHD (1920x1080).
I am booting with "i915.force_probe=4c8a" on the kernel command line.
My desktop is XFCE4.
CPU is: processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 167 model name : 11th Gen Intel(R) Core(TM) i9-11900 @ 2.50GHz stepping : 1 microcode : 0x40 cpu MHz : 1021.742 cache size : 16384 KB physical id : 0 siblings : 16
with an H470 chipset. (ASRock DeskMini H470)
00:02.0 VGA compatible controller: Intel Corporation RocketLake-S GT1 [UHD Graphics 750] (rev 04)
or verbose:
00:02.0 VGA compatible controller: Intel Corporation RocketLake-S GT1 [UHD Graphics 750] (rev 04) (prog-if 00 [VGA controller]) Subsystem: ASRock Incorporation Device 4c8a Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 153 Region 0: Memory at b0000000 (64-bit, non-prefetchable) [size=16M] Region 2: Memory at a0000000 (64-bit, prefetchable) [size=256M] Region 4: I/O ports at 3000 [size=64] [virtual] Expansion ROM at 000c0000 [disabled] [size=128K] Capabilities: [40] Vendor Specific Information: Len=0c <?> Capabilities: [70] Express (v2) Root Complex Integrated Endpoint, MSI 00 DevCap: MaxPayload 128 bytes, PhantFunc 0 ExtTag- RBE+ DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported- RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop- MaxPayload 128 bytes, MaxReadReq 128 bytes DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend- DevCap2: Completion Timeout: Not Supported, TimeoutDis-, LTR-, O BFF Not Supported AtomicOpsCap: 32bit- 64bit- 128bitCAS- DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled AtomicOpsCtl: ReqEn- Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable+ 64bit- Address: fee00018 Data: 0000 Masking: 00000000 Pending: 00000000 Capabilities: [d0] Power Management version 2 Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot -,D3cold-) Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- Capabilities: [100 v1] Process Address Space ID (PASID) PASIDCap: Exec- Priv-, Max PASID Width: 14 PASIDCtl: Enable- Exec- Priv- Capabilities: [200 v1] Address Translation Service (ATS) ATSCap: Invalidate Queue Depth: 00 ATSCtl: Enable-, Smallest Translation Unit: 00 Capabilities: [300 v1] Page Request Interface (PRI) PRICtl: Enable- Reset- PRISta: RF- UPRGI- Stopped+ Page Request Capacity: 00008000, Page Request Allocation: 00000000 Kernel driver in use: i915 Kernel modules: i915
Kernel 5.14 boot log with drm.debug=14 is attached (as requested by Jani). Highlight (or lowlight) might be this line: [drm:drm_mode_prune_invalid] Not using 2560x1440 mode: CLOCK_HIGH