From: Ping-Ke Shih <pkshih@realtek.com>
To: Chris <russomch@aol.com>,
"intel-xe@lists.freedesktop.org" <intel-xe@lists.freedesktop.org>,
"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
Subject: RE: [BUG] Intel B580 (e20b) HDMI Flicker & Realtek RTL8922AE 6GHz missing - Mint 22.3
Date: Wed, 24 Dec 2025 02:12:28 +0000 [thread overview]
Message-ID: <dae24a713d354c27ac3814c02822099d@realtek.com> (raw)
In-Reply-To: <2033055489.1974567.1766503717295@mail.yahoo.com>
Chris <russomch@aol.com> wrote:
> On Tuesday, December 23, 2025 at 02:48:01 AM EST, Ping-Ke Shih <pkshih@realtek.com> wrote:
>
>
>
>
> Chris Russomanno <russomch@aol.com> wrote:
>
> > Hello,
> >
> > I am reporting two issues encountered on brand-new hardware using Linux Mint 22.3 with Kernel
> 6.14.0-generic.
> >
> > Hardware Environment:
> > - GPU: Intel Arc B580 (Battlemage), PCI ID: [8086:e20b]
> > - WiFi: Realtek RTL8922AE (rtw89), Firmware: rtw8922a_fw-3.bin
> > - Display: Samsung 4K Monitor connected via HDMI (No DisplayPort available)
> >
> > Issue 1: Intel Xe HDMI Flickering
> > The Samsung monitor experiences intermittent black-screen flickering (1-2 seconds) at both 4K and 1080p
> > resolutions. This behavior is not present on Windows 11.
> > Troubleshooting attempted:
> > - Added kernel parameters: quiet splash i915.enable_psr=0 xe.force_probe=e20b i915.enable_dc=0
> > intel_iommu=igfx_off intel_idle.max_cstate=2
> > - Forced "TearFree" and "TripleBuffer" in xorg.conf.
> > - Frequency remains at 60Hz.
> >
> > Issue 2: Realtek RTL8922AE 6GHz/WiFi 7 Missing
> > The card functions on 5GHz (1200 Mb/s) but does not scan or see 6GHz frequencies.
> > Troubleshooting attempted:
> > - Set regdom to US (iw reg set US).
> > - Driver options: rtw89_pci disable_aspm=y, rtw89_core disable_6g=N.
> > - 'iw list' does not return any 6GHz/6105 MHz frequencies.
>
>
> Please share output of 'iw list' before/after setting US.
>
> In my side (expected) frequencies of band 4 are:
>
> [Before]
> Frequencies:
> * 5955.0 MHz [1] (disabled)
> * 5975.0 MHz [5] (disabled)
> * 5995.0 MHz [9] (disabled)
> * 6015.0 MHz [13] (disabled)
> * 6035.0 MHz [17] (disabled)
> * 6055.0 MHz [21] (disabled)
>
> [After]
> Frequencies:
> * 5955.0 MHz [1] (12.0 dBm) (no IR)
> * 5975.0 MHz [5] (12.0 dBm) (no IR)
> * 5995.0 MHz [9] (12.0 dBm) (no IR)
> * 6015.0 MHz [13] (12.0 dBm) (no IR)
> * 6035.0 MHz [17] (12.0 dBm) (no IR)
>
>
>
> ________________________
>
>
>
>
> Hello Ping-Ke,
>
> Here is the output from my RTL8922AE on Linux Mint 22.3 (Kernel 6.x):
>
> [Before iw reg set US]
>
> Frequencies:
> * 5955.0 MHz [1] (12.0 dBm) (no IR)
> * 5975.0 MHz [5] (12.0 dBm) (no IR)
> * 5995.0 MHz [9] (12.0 dBm) (no IR)
> * 6015.0 MHz [13] (12.0 dBm) (no IR)
> * 6035.0 MHz [17] (12.0 dBm) (no IR)
> * 6055.0 MHz [21] (12.0 dBm) (no IR)
> * 6075.0 MHz [25] (12.0 dBm) (no IR)
> * 6095.0 MHz [29] (12.0 dBm) (no IR)
> * 6115.0 MHz [33] (12.0 dBm) (no IR)
> * 6135.0 MHz [37] (12.0 dBm) (no IR)
> * 6155.0 MHz [41] (12.0 dBm) (no IR)
> * 6175.0 MHz [45] (12.0 dBm) (no IR)
> * 6195.0 MHz [49] (12.0 dBm) (no IR)
> * 6215.0 MHz [53] (12.0 dBm) (no IR)
> * 6235.0 MHz [57] (12.0 dBm) (no IR)
> * 6255.0 MHz [61] (12.0 dBm) (no IR)
> * 6275.0 MHz [65] (12.0 dBm) (no IR)
> * 6295.0 MHz [69] (12.0 dBm) (no IR)
> * 6315.0 MHz [73] (12.0 dBm) (no IR)
> * 6335.0 MHz [77] (12.0 dBm) (no IR)
> * 6355.0 MHz [81] (12.0 dBm) (no IR)
> * 6375.0 MHz [85] (12.0 dBm) (no IR)
> * 6395.0 MHz [89] (12.0 dBm) (no IR)
> * 6415.0 MHz [93] (12.0 dBm) (no IR)
> * 6435.0 MHz [97] (12.0 dBm) (no IR)
> * 6455.0 MHz [101] (12.0 dBm) (no IR)
> * 6475.0 MHz [105] (12.0 dBm) (no IR)
> * 6495.0 MHz [109] (12.0 dBm) (no IR)
> * 6515.0 MHz [113] (12.0 dBm) (no IR)
> * 6535.0 MHz [117] (12.0 dBm) (no IR)
> * 6555.0 MHz [121] (12.0 dBm) (no IR)
> * 6575.0 MHz [125] (12.0 dBm) (no IR)
> * 6595.0 MHz [129] (12.0 dBm) (no IR)
> * 6615.0 MHz [133] (12.0 dBm) (no IR)
> * 6635.0 MHz [137] (12.0 dBm) (no IR)
> * 6655.0 MHz [141] (12.0 dBm) (no IR)
> * 6675.0 MHz [145] (12.0 dBm) (no IR)
> * 6695.0 MHz [149] (12.0 dBm) (no IR)
> * 6715.0 MHz [153] (12.0 dBm) (no IR)
> * 6735.0 MHz [157] (12.0 dBm) (no IR)
> * 6755.0 MHz [161] (12.0 dBm) (no IR)
> * 6775.0 MHz [165] (12.0 dBm) (no IR)
> * 6795.0 MHz [169] (12.0 dBm) (no IR)
> * 6815.0 MHz [173] (12.0 dBm) (no IR)
> * 6835.0 MHz [177] (12.0 dBm) (no IR)
> * 6855.0 MHz [181] (12.0 dBm) (no IR)
> * 6875.0 MHz [185] (12.0 dBm) (no IR)
> * 6895.0 MHz [189] (12.0 dBm) (no IR)
> * 6915.0 MHz [193] (12.0 dBm) (no IR)
> * 6935.0 MHz [197] (12.0 dBm) (no IR)
> * 6955.0 MHz [201] (12.0 dBm) (no IR)
> * 6975.0 MHz [205] (12.0 dBm) (no IR)
> * 6995.0 MHz [209] (12.0 dBm) (no IR)
> * 7015.0 MHz [213] (12.0 dBm) (no IR)
> * 7035.0 MHz [217] (12.0 dBm) (no IR)
> * 7055.0 MHz [221] (12.0 dBm) (no IR)
> * 7075.0 MHz [225] (12.0 dBm) (no IR)
> * 7095.0 MHz [229] (12.0 dBm) (no IR)
> * 7115.0 MHz [233] (12.0 dBm) (no IR)
>
>
> [After iw reg set US]
>
> Frequencies:
> * 5955.0 MHz [1] (12.0 dBm) (no IR)
> * 5975.0 MHz [5] (12.0 dBm) (no IR)
> * 5995.0 MHz [9] (12.0 dBm) (no IR)
> * 6015.0 MHz [13] (12.0 dBm) (no IR)
> * 6035.0 MHz [17] (12.0 dBm) (no IR)
> * 6055.0 MHz [21] (12.0 dBm) (no IR)
> * 6075.0 MHz [25] (12.0 dBm) (no IR)
> * 6095.0 MHz [29] (12.0 dBm) (no IR)
> * 6115.0 MHz [33] (12.0 dBm) (no IR)
> * 6135.0 MHz [37] (12.0 dBm) (no IR)
> * 6155.0 MHz [41] (12.0 dBm) (no IR)
> * 6175.0 MHz [45] (12.0 dBm) (no IR)
> * 6195.0 MHz [49] (12.0 dBm) (no IR)
> * 6215.0 MHz [53] (12.0 dBm) (no IR)
> * 6235.0 MHz [57] (12.0 dBm) (no IR)
> * 6255.0 MHz [61] (12.0 dBm) (no IR)
> * 6275.0 MHz [65] (12.0 dBm) (no IR)
> * 6295.0 MHz [69] (12.0 dBm) (no IR)
> * 6315.0 MHz [73] (12.0 dBm) (no IR)
> * 6335.0 MHz [77] (12.0 dBm) (no IR)
> * 6355.0 MHz [81] (12.0 dBm) (no IR)
> * 6375.0 MHz [85] (12.0 dBm) (no IR)
> * 6395.0 MHz [89] (12.0 dBm) (no IR)
> * 6415.0 MHz [93] (12.0 dBm) (no IR)
> * 6435.0 MHz [97] (12.0 dBm) (no IR)
> * 6455.0 MHz [101] (12.0 dBm) (no IR)
> * 6475.0 MHz [105] (12.0 dBm) (no IR)
> * 6495.0 MHz [109] (12.0 dBm) (no IR)
> * 6515.0 MHz [113] (12.0 dBm) (no IR)
> * 6535.0 MHz [117] (12.0 dBm) (no IR)
> * 6555.0 MHz [121] (12.0 dBm) (no IR)
> * 6575.0 MHz [125] (12.0 dBm) (no IR)
> * 6595.0 MHz [129] (12.0 dBm) (no IR)
> * 6615.0 MHz [133] (12.0 dBm) (no IR)
> * 6635.0 MHz [137] (12.0 dBm) (no IR)
> * 6655.0 MHz [141] (12.0 dBm) (no IR)
> * 6675.0 MHz [145] (12.0 dBm) (no IR)
> * 6695.0 MHz [149] (12.0 dBm) (no IR)
> * 6715.0 MHz [153] (12.0 dBm) (no IR)
> * 6735.0 MHz [157] (12.0 dBm) (no IR)
> * 6755.0 MHz [161] (12.0 dBm) (no IR)
> * 6775.0 MHz [165] (12.0 dBm) (no IR)
> * 6795.0 MHz [169] (12.0 dBm) (no IR)
> * 6815.0 MHz [173] (12.0 dBm) (no IR)
> * 6835.0 MHz [177] (12.0 dBm) (no IR)
> * 6855.0 MHz [181] (12.0 dBm) (no IR)
> * 6875.0 MHz [185] (12.0 dBm) (no IR)
> * 6895.0 MHz [189] (12.0 dBm) (no IR)
> * 6915.0 MHz [193] (12.0 dBm) (no IR)
> * 6935.0 MHz [197] (12.0 dBm) (no IR)
> * 6955.0 MHz [201] (12.0 dBm) (no IR)
> * 6975.0 MHz [205] (12.0 dBm) (no IR)
> * 6995.0 MHz [209] (12.0 dBm) (no IR)
> * 7015.0 MHz [213] (12.0 dBm) (no IR)
> * 7035.0 MHz [217] (12.0 dBm) (no IR)
> * 7055.0 MHz [221] (12.0 dBm) (no IR)
> * 7075.0 MHz [225] (12.0 dBm) (no IR)
> * 7095.0 MHz [229] (12.0 dBm) (no IR)
> * 7115.0 MHz [233] (12.0 dBm) (no IR)
>
>
> I have tested the iw list command before and after setting the region to US.
>
> The Result: The frequencies in Band 4 remain identical. Both "Before" and "After" already show (no IR) for
> all 6GHz frequencies. There was no change from (disabled) to (no IR), as they were already set to (no IR).
>
> Even with the status at (no IR), the card is unable to see or connect to my 6GHz SSID, which is confirmed
> working on other devices and even with Windows 11. It appears the card remains in a passive-only state
> regardless of the regulatory setting.
At 6GHz channels, it should be passive scan.
With "no IR", I suppose it can find AP operating on 6GHz channels, so let's
clarify scan first. Setup a trace-cmd before doing scan at another terminal.
sudo trace-cmd record -e mac80211 -e cfg80211
Then, do scan by
sudo iw wlan1 scan | grep "\(SSID\|freq\):"
Stop trace-cmd by ctrl-C, and check report by
trace-cmd report
If you can see something like below, AP on 6GHz channels is found:
(trace-cmd report)
cfg80211_return_bss: aa:bb:cc:dd:ee:ff, band: 3, freq: 6135.000
(iw scan result)
freq: 6135.0
SSID: abc_6G
Ping-Ke
next prev parent reply other threads:[~2025-12-24 2:12 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <AB8446D8-708B-4971-8852-87353112E60F.ref@aol.com>
2025-12-20 7:36 ` [BUG] Intel B580 (e20b) HDMI Flicker & Realtek RTL8922AE 6GHz missing - Mint 22.3 Chris Russomanno
2025-12-22 15:09 ` Jani Nikula
2025-12-23 7:47 ` Ping-Ke Shih
2025-12-23 15:28 ` Chris
2025-12-24 2:12 ` Ping-Ke Shih [this message]
2025-12-27 5:21 ` Chris
2025-12-29 0:54 ` Ping-Ke Shih
2025-12-30 7:22 ` Chris
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=dae24a713d354c27ac3814c02822099d@realtek.com \
--to=pkshih@realtek.com \
--cc=intel-xe@lists.freedesktop.org \
--cc=linux-wireless@vger.kernel.org \
--cc=russomch@aol.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox