Intel Alder Lake GPU performance much lower in 6.1/6.2 compared to 5.19

Intel Alder Lake GPU performance is much lower in 6.1 compared to 5.19.

For example, benchmarking gnome-shell main running on Xorg:

6.1.0-16-generic
30.02 FPS, average: 15.5ms, peak: 16.4ms
intel_gpu_top says 211/208 MHz despite gt_min_freq_mhz==300

5.19.0-21-generic
60.00 FPS, average: 8.3ms, peak: 8.7ms
intel_gpu_top says 542/560 MHz

The issue is so severe in 6.1.0-16-generic that even triple buffering can't fix it for Xorg sessions. It does for Wayland though.

I can work around it with `cp gt_max_freq_mhz gt_min_freq_mhz` but probably shouldn't need to.

ProblemType: Bug
DistroRelease: Ubuntu 23.04
Package: linux-image-6.1.0-16-generic 6.1.0-16.16
ProcVersionSignature: Ubuntu 6.1.0-16.16-generic 6.1.6
Uname: Linux 6.1.0-16-generic x86_64
ApportVersion: 2.26.0-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: dan 1730 F.... wireplumber
 /dev/snd/seq: dan 1727 F.... pipewire
CRDA: N/A
CasperMD5CheckResult: pass
Date: Thu Mar 16 19:31:50 2023
InstallationDate: Installed on 2022-11-28 (108 days ago)
InstallationMedia: Ubuntu 23.04 "Lunar Lobster" - Alpha amd64 (20221126)
MachineType: Intel(R) Client Systems NUC12DCMi7
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.1.0-16-generic root=UUID=3a6db1e7-0341-452a-80e1-2895838feeac ro quiet splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-6.1.0-16-generic N/A
 linux-backports-modules-6.1.0-16-generic N/A
 linux-firmware 20230302.git60971a64-0ubuntu1
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/20/2021
dmi.bios.release: 5.24
dmi.bios.vendor: Intel Corp.
dmi.bios.version: EDADL579.0046.2021.1220.2351
dmi.board.name: NUC12EDBi7
dmi.board.vendor: Intel Corporation
dmi.board.version: M27908-302
dmi.chassis.type: 35
dmi.chassis.vendor: Intel Corporation
dmi.chassis.version: 2.0
dmi.ec.firmware.release: 3.7
dmi.modalias: dmi:bvnIntelCorp.:bvrEDADL579.0046.2021.1220.2351:bd12/20/2021:br5.24:efr3.7:svnIntel(R)ClientSystems:pnNUC12DCMi7:pvrM30143-302:rvnIntelCorporation:rnNUC12EDBi7:rvrM27908-302:cvnIntelCorporation:ct35:cvr2.0:skuRNUC12DCMi70000:
dmi.product.family: DC
dmi.product.name: NUC12DCMi7
dmi.product.sku: RNUC12DCMi70000
dmi.product.version: M30143-302
dmi.sys.vendor: Intel(R) Client Systems