Yes, I can try two panels of the same model. The results are: LG 32UL950 + LG 27UL850 => "MCLK constant boost" (issue) LG 27UL950 + LG 27UL850 => "MCLK is scaling down" (no-issue)
> > [AMD Official Use Only - AMD Internal Distribution Only] > > > yeah, there timings look the same, but could you try panels of exactly the > same model? > > > > Humphrey > > > > ________________________________ > From: Jaroslav Pulchart <jaroslav.pulch...@gmail.com> > Sent: Tuesday, July 2, 2024 13:59 > To: Feng, Kenneth <kenneth.f...@amd.com> > Cc: Li, Humphrey <humphrey...@amd.com>; Alex Deucher <alexdeuc...@gmail.com>; > amd-gfx@lists.freedesktop.org <amd-gfx@lists.freedesktop.org> > Subject: Re: High Power Consumption of AMD RX6800xt in Idle with Secondary > Monitor Connected > > Caution: This message originated from an External Source. Use proper caution > when opening attachments, clicking links, or responding. > > > I see the same modeline setting for both of them, does that mean "same > timing" ? > > $ xrandr --verbose | grep '*current' -A 2 > 3840x2160 (0x4a) 533.250MHz +HSync -VSync *current +preferred > h: width 3840 start 3888 end 3920 total 4000 skew 0 clock > 133.31KHz > v: height 2160 start 2214 end 2219 total 2222 clock 60.00Hz > -- > 3840x2160 (0x4a) 533.250MHz +HSync -VSync *current +preferred > h: width 3840 start 3888 end 3920 total 4000 skew 0 clock > 133.31KHz > v: height 2160 start 2214 end 2219 total 2222 clock 60.00Hz > > > > > > [AMD Official Use Only - AMD Internal Distribution Only] > > > > The two high resolution panels have different timings so it's needed to be > > fixed to high memory clock level. > > @Li, Humphrey to further comment. > > Thanks. > > > > > > -----Original Message----- > > From: Jaroslav Pulchart <jaroslav.pulch...@gmail.com> > > Sent: Tuesday, July 2, 2024 12:20 PM > > To: Feng, Kenneth <kenneth.f...@amd.com> > > Cc: Alex Deucher <alexdeuc...@gmail.com>; amd-gfx@lists.freedesktop.org > > Subject: Re: High Power Consumption of AMD RX6800xt in Idle with Secondary > > Monitor Connected > > > > Caution: This message originated from an External Source. Use proper > > caution when opening attachments, clicking links, or responding. > > > > > > Hi, > > > > Yes, they are 4k monitors. Any reason for such and expected boost for them? > > > > BTW: I try to increase blanking periods for both monitors without any > > change. > > > > Jaroslav P. > > > > > > > > [AMD Official Use Only - AMD Internal Distribution Only] > > > > > > Hi Jaroslav, > > > Are both of your monitors 4K resolution? > > > Then most likely the memory clock is expected to be boosted. > > > Thanks. > > > > > > > > > -----Original Message----- > > > From: amd-gfx <amd-gfx-boun...@lists.freedesktop.org> On Behalf Of > > > Alex Deucher > > > Sent: Monday, July 1, 2024 11:07 PM > > > To: Jaroslav Pulchart <jaroslav.pulch...@gmail.com> > > > Cc: amd-gfx@lists.freedesktop.org > > > Subject: Re: High Power Consumption of AMD RX6800xt in Idle with > > > Secondary Monitor Connected > > > > > > Caution: This message originated from an External Source. Use proper > > > caution when opening attachments, clicking links, or responding. > > > > > > > > > On Mon, Jul 1, 2024 at 3:25 AM Jaroslav Pulchart > > > <jaroslav.pulch...@gmail.com> wrote: > > > > > > > > Dear AMD GPU Kernel Maintainers, > > > > > > > > I am writing to report an issue with high power consumption of my > > > > AMD RX6800xt graphics card when a secondary monitor is connected. > > > > > > > > Upon investigation, I observed that my desktop computer generates > > > > more heat while idling. I determined that the high power consumption > > > > issue arises when I connect a secondary monitor to my AMD RX6800xt > > > > card, causing it to consume approximately 40W of power in idle state . > > > > > > > > I checked the "GFX Clocks and Power:" in > > > > /sys/kernel/debug/dri/1/amdgpu_pm_info of my RX6800xt during idle, > > > > and here are the findings: > > > > > > > > With the secondary monitor connected memory frequency is up and > > > > constantly at 1000MHz: > > > > 1000 MHz (MCLK) > > > > 3 MHz (SCLK) > > > > 1825 MHz (PSTATE_SCLK) > > > > 1000 MHz (PSTATE_MCLK) > > > > 856 mV (VDDGFX) > > > > 45.00 W (average SoC) > > > > > > > > Single monitor connected: > > > > 96 MHz (MCLK) > > > > 0 MHz (SCLK) > > > > 1825 MHz (PSTATE_SCLK) > > > > 1000 MHz (PSTATE_MCLK) > > > > 6 mV (VDDGFX) > > > > 8.00 W (average SoC) > > > > > > > > The significant difference in power consumption between the two > > > > states indicates a potential issue in power management that needs to > > > > be addressed. Your assistance in resolving this matter would be > > > > greatly appreciated. > > > > > > It depends on the timing of the monitors. The memory reclocking can only > > > occur during blanking periods on the monitors. If the reclocking is done > > > outside of the blanking periods, you will see flickering or artifacts on > > > the display when it happens. If the blanking periods are too short the > > > driver can only downclock memory when the displays are off. Adding more > > > monitors makes this harder as you have to take into account the blanking > > > periods on all monitors. You can try adjusting the modelines used on > > > each display to increase the blanking periods. > > > > > > Alex
