Re: [REGRESSION] Intel Turbo Boost stuck disabled on some Clevo machines (was: [PATCH] cpufreq: intel_pstate: Unchecked MSR aceess in legacy mode)

[Aaron Rainbolt <arainbolt@kfocus.org>]

On Mon, 10 Nov 2025 08:58:55 -0800
srinivas pandruvada <srinivas.pandruvada@linux.intel.com> wrote:

> + Thomas
> 
> Please verify so that I can post the patch.
> 
> Thanks,
> Srinivas

Hi Srinivas,

I have tested the newest patch against KFocus's 6.14 kernel on the
affected hardware, and can confirm that this patch also allows Turbo
Boost to function correctly. High-frequency modes are available in
cpupower-gui, and the "Turbo disabled by BIOS or unavailable on
processor" messages stop occurring in dmesg shortly after boot.

Tested-by: Aaron Rainbolt <arainbolt@kfocus.org>

--
Aaron

> 
> On Thu, 2025-11-06 at 17:48 -0800, srinivas pandruvada wrote:
> > Hi Aaron,
> > 
> > Please again verify this change. This limits the scope.
> > Patch attached.
> > 
> > Thanks,
> > Srinivas
> > 
> > On Thu, 2025-11-06 at 11:31 -0600, Aaron Rainbolt wrote:  
> > > On Thu, 06 Nov 2025 07:23:14 -0800
> > > srinivas pandruvada <srinivas.pandruvada@linux.intel.com> wrote:
> > >   
> > > > Hi Aaron,
> > > > 
> > > > On Wed, 2025-09-10 at 15:33 -0500, Aaron Rainbolt wrote:  
> > > > > On Wed, 10 Sep 2025 10:15:00 -0700
> > > > > srinivas pandruvada <srinivas.pandruvada@linux.intel.com>
> > > > > wrote:
> > > > >     
> > > > > > On Wed, 2025-09-10 at 11:36 -0500, Aaron Rainbolt wrote:    
> > > > > > > On Wed, 30 Apr 2025 16:29:09 +0200
> > > > > > > "Rafael J. Wysocki" <rafael@kernel.org> wrote:
> > > > > > >       
> > > > > > > > On Tue, Apr 29, 2025 at 11:07 PM Srinivas Pandruvada
> > > > > > > > <srinivas.pandruvada@linux.intel.com> wrote:      
> > > > > > > > > 
> > > > > > > > > When turbo mode is unavailable on a Skylake-X system,
> > > > > > > > > executing
> > > > > > > > > the
> > > > > > > > > command:
> > > > > > > > > "echo 1 >
> > > > > > > > > /sys/devices/system/cpu/intel_pstate/no_turbo"
> > > > > > > > > results in an unchecked MSR access error: WRMSR to
> > > > > > > > > 0x199
> > > > > > > > > (attempted to write 0x0000000100001300).    
> > > > Please try the attached patch, if this address this issue.  
> > > 
> > > I can confirm that this patch does resolve the issue when applied
> > > to
> > > Kubuntu Focus's 6.14 kernel. CPU frequencies are available that
> > > require
> > > turbo boost, and `cat /sys/devices/system/cpu/intel_pstate`
> > > returns `0`. The logs from `dmesg` also indicate that turbo was
> > > disabled earlier in boot, but the warnings about turbo being
> > > disabled stop appearing later on, even when manipulating the
> > > `no_turbo` file:
> > > 
> > > [   25.893012] intel_pstate: Turbo is disabled
> > > [   25.893019] intel_pstate: Turbo disabled by BIOS or unavailable
> > > on
> > > processor
> > > [   25.950587] NET: Registered PF_QIPCRTR protocol family
> > > [   26.599013] Realtek Internal NBASE-T PHY r8169-0-6c00:00:
> > > attached
> > > PHY driver (mii_bus:phy_addr=r8169-0-6c00:00, irq=MAC)
> > > [   26.725959] ACPI BIOS Error (bug): Could not resolve symbol
> > > [\_TZ.ETMD], AE_NOT_FOUND (20240827/psargs-332)
> > > 
> > > [   26.725976] No Local Variables are initialized for Method
> > > [_OSC]
> > > 
> > > [   26.725978] Initialized Arguments for Method [_OSC]:  (4
> > > arguments
> > > defined for method invocation)
> > > [   26.725979]   Arg0:   0000000030ddf166 <Obj>          
> > > Buffer(16)
> > > 5D A8 3B B2 B7 C8 42 35
> > > [   26.725991]   Arg1:   0000000002bd3ac4 <Obj>           Integer
> > > 0000000000000001
> > > [   26.725996]   Arg2:   0000000033eb047e <Obj>           Integer
> > > 0000000000000002
> > > [   26.725999]   Arg3:   00000000de6cf5f1 <Obj>
> > > Buffer(8) 00 00 00 00 05 00 00 00
> > > 
> > > [   26.726010] ACPI Error: Aborting method \_SB.IETM._OSC due to
> > > previous error (AE_NOT_FOUND) (20240827/psparse-529)
> > > [   26.726056] Consider using thermal netlink events interface
> > > [   26.769209] r8169 0000:6c:00.0 enp108s0: Link is Down
> > > [   26.857318] zram0: detected capacity change from 0 to 195035136
> > > [   26.864390] vboxdrv: Found 32 processor cores/threads
> > > [   26.873227] Adding 97517564k swap on /dev/zram0.  Priority:-2
> > > extents:1 across:97517564k SS
> > > [   26.880588] vboxdrv: TSC mode is Invariant, tentative frequency
> > > 2419194640 Hz
> > > [   26.880592] vboxdrv: Successfully loaded version 7.2.4 r170995
> > > (interface 0x00340001)
> > > [   26.895725] intel_pstate: Turbo is disabled
> > > [   26.895730] intel_pstate: Turbo disabled by BIOS or unavailable
> > > on
> > > processor
> > > [   26.943715] iwlwifi 0000:00:14.3: WFPM_UMAC_PD_NOTIFICATION:
> > > 0x20
> > > [   26.943746] iwlwifi 0000:00:14.3: WFPM_LMAC2_PD_NOTIFICATION:
> > > 0x1f
> > > [   26.943755] iwlwifi 0000:00:14.3: WFPM_AUTH_KEY_0: 0x90
> > > [   26.943765] iwlwifi 0000:00:14.3: CNVI_SCU_SEQ_DATA_DW9: 0x0
> > > [   26.944901] iwlwifi 0000:00:14.3: RFIm is deactivated, reason =
> > > 5
> > > [   27.045437] iwlwifi 0000:00:14.3: Registered PHC clock:
> > > iwlwifi- PTP, with index: 0
> > > [   27.098590] VBoxNetFlt: Successfully started.
> > > [   27.101687] VBoxNetAdp: Successfully started.
> > > [   27.153602] bridge: filtering via arp/ip/ip6tables is no longer
> > > available by default. Update your scripts to load br_netfilter if
> > > you
> > > need this.
> > > [   27.851014] loop14: detected capacity change from 0 to 8
> > > [   27.895706] r8169 0000:6c:00.0: invalid VPD tag 0xff (size 0)
> > > at offset 0; assume missing optional EEPROM
> > > [   28.898015] intel_pstate: Turbo is disabled
> > > [   28.898021] intel_pstate: Turbo disabled by BIOS or unavailable
> > > on
> > > processor
> > > [   31.900781] intel_pstate: Turbo is disabled
> > > [   31.900788] intel_pstate: Turbo disabled by BIOS or unavailable
> > > on
> > > processor
> > > [   33.959448] Bluetooth: RFCOMM TTY layer initialized
> > > [   33.959456] Bluetooth: RFCOMM socket layer initialized
> > > [   33.959462] Bluetooth: RFCOMM ver 1.11
> > > [   36.903768] intel_pstate: Turbo is disabled
> > > [   36.903777] intel_pstate: Turbo disabled by BIOS or unavailable
> > > on
> > > processor
> > > [   38.054345] systemd-journald[883]:
> > > /var/log/journal/a9e8e3d2041547169b107e1e1a23f2ce/user-
> > > 1000.journal:
> > > Journal file uses a different sequence number ID, rotating.
> > > [   39.799560] warning: `kded5' uses wireless extensions which
> > > will stop working for Wi-Fi 7 hardware; use nl80211
> > > [   40.884365] wlp0s20f3: authenticate with 18:ee:86:8b:16:a2
> > > (local
> > > address=98:bd:80:8a:e9:27)
> > > [   40.885147] wlp0s20f3: send auth to 18:ee:86:8b:16:a2 (try 1/3)
> > > [   40.968595] wlp0s20f3: authenticate with 18:ee:86:8b:16:a2
> > > (local
> > > address=98:bd:80:8a:e9:27)
> > > [   40.968603] wlp0s20f3: send auth to 18:ee:86:8b:16:a2 (try 1/3)
> > > [   40.980941] wlp0s20f3: authenticated
> > > [   40.981904] wlp0s20f3: associate with 18:ee:86:8b:16:a2 (try
> > > 1/3)
> > > [   41.042933] wlp0s20f3: RX AssocResp from 18:ee:86:8b:16:a2
> > > (capab=0x1431 status=0 aid=14)
> > > [   41.046917] wlp0s20f3: associated
> > > 
> > > If you post the patch, I'm happy to add a `Tested-by` tag for it.
> > > Thank you for your help!
> > >   
> > > > Thanks,
> > > > Srinivas  
> > > 
> > >