Kernel/driver downward compatibility

Dear all,
I have an EL5 Update 4 installation. My WLAN card has a BCM4318 chip from Broadcom. As stated on Broadcom's home page, I normally needed a b43 driver--however, this requires kernel 2.6.25 or higher. My kernel is 2.6.18, as originally downloaded from Oracle's web site. It as a deprecated driver bcm43xx installed, modprobe shows it up. However, this driver can not control the above card. LAN is working OK.
My questieon is: Can I get and install a much newer b43 driver to cooperate with my older kernel or is downward compatibility excluded?
Lately I used an up2date for my ULN, no change in kernel.
Then I looked round for latest versions, and downloaded some kernel-2.6.18-164.11.1.0.1.el5.i686.rpm package, When trying to install it I get
Can't install a different arch of /root/Desktop/kernel-2.6.18-164.11.1.0.1.el5.i686.rpm than already installed.
Can anyone help me what to do for me not to damage anything that is already working properly?
Thanks, kind regards,
Miklos HERBOLY

This questions comes up a lot recently.
OEL is a server distribution and is not likely to keep abreast of the latest
wireless technology. So if your wireless card isn't properly detected out of
the box, you are pretty much own your own.
That being said, if you do this:
# /bin/rpm -qa --qf="%{NAME}-%{VERSION}-%{REVISION}.%{ARCH}.rpm\n" kernel\*You will get the exact name of the kernel RPM for your current install. If
you get a newer kernel from somewhere, the VERSION and REVISION portions may
differ, but the rest should be the same as you currently have.

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My wifi card RTL8188CE does not work consistently with kernel driver rlt8192ce. The problem that i observe is that after some time ~1hr wifi devices get disconnected and are not able to reconnect. On restarting wifi using systemctl restart hostapd sometimes the system hangs.
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03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter (rev 01)
Subsystem: ASUSTeK Computer Inc. Device 84b5
Kernel driver in use: rtl8192ce
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Jan 22 19:30:56 Blitz-4 kernel: DMA: Out of SW-IOMMU space for 105 bytes at device 0000:05:00.0
Jan 22 19:30:56 Blitz-4 kernel: [color=red]rtl8192ce 0000:05:00.0: swiotlb buffer is full (sz: 105 bytes)[/color]
Jan 22 19:30:56 Blitz-4 kernel: DMA: Out of SW-IOMMU space for 105 bytes at device 0000:05:00.0
Jan 22 19:30:56 Blitz-4 kernel: rtl8192ce 0000:05:00.0: swiotlb buffer is full (sz: 105 bytes)
Jan 22 19:30:56 Blitz-4 kernel: DMA: Out of SW-IOMMU space for 105 bytes at device 0000:05:00.0
Jan 22 19:30:57 Blitz-4 kernel: rtl8192ce 0000:05:00.0: swiotlb buffer is full (sz: 105 bytes)
Jan 22 19:30:57 Blitz-4 kernel: DMA: Out of SW-IOMMU space for 105 bytes at device 0000:05:00.0
Jan 22 19:30:57 Blitz-4 kernel: rtl8192ce 0000:05:00.0: swiotlb buffer is full (sz: 105 bytes)
Jan 22 19:30:57 Blitz-4 kernel: DMA: Out of SW-IOMMU space for 105 bytes at device 0000:05:00.0
Jan 22 19:30:57 Blitz-4 kernel: DMA: Out of SW-IOMMU space for 105 bytes at device 0000:05:00.0
Jan 22 19:30:57 Blitz-4 kernel: DMA: Out of SW-IOMMU space for 9100 bytes at device 0000:05:00.0
Jan 22 19:30:57 Blitz-4 kernel: DMA: Out of SW-IOMMU space for 105 bytes at device 0000:05:00.0
Jan 22 19:30:57 Blitz-4 kernel: DMA: Out of SW-IOMMU space for 105 bytes at device 0000:05:00.0
Jan 22 19:30:57 Blitz-4 kernel: DMA: Out of SW-IOMMU space for 105 bytes at device 0000:05:00.0
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Jan 22 19:30:58 Blitz-4 kernel: button lpc_ich processor sch_fq_codel ext4 crc16 mbcache jbd2 sd_mod atkbd libps2 ahci libahci libata xhci_pci ehci_pci xhci_hcd ehci_hcd scsi_mod usbcore usb_common i8042 serio
Jan 22 19:30:58 Blitz-4 kernel:CPU: 3 PID: 1238 Comm: Cache2 I/O Tainted: G O 3.18.2-2-ARCH #1
Please suggest any workaround/modules.

Same problem to me. lspci output:
07:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter (rev 01)
and logs:
Apr 04 16:06:29 nzk kernel: rtl8192ce 0000:07:00.0: swiotlb buffer is full (sz: 9100 bytes)
Apr 04 16:06:29 nzk kernel: DMA: Out of SW-IOMMU space for 9100 bytes at device 0000:07:00.0
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Apr 04 16:06:29 nzk kernel: DMA: Out of SW-IOMMU space for 9100 bytes at device 0000:07:00.0
Apr 04 16:06:29 nzk kernel: rtl8192ce 0000:07:00.0: swiotlb buffer is full (sz: 9100 bytes)
Apr 04 16:06:29 nzk kernel: DMA: Out of SW-IOMMU space for 9100 bytes at device 0000:07:00.0
A bug report submitted to redhat bugzilla https://bugzilla.redhat.com/show_bug.cg … id=1203241 suggests it may be caused by a bug in the rtl8192ce kernel module since linux 3.17.7. I hope this problem could be solved as quickly as possible.
Last edited by mike_nzk (2015-04-04 08:33:59)

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user12144220 wrote:
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> I have an important monitoring system that is controlled by a Linux
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