sid (unstable): 4.19.37-6
buster (testing): 4.19.37-5+deb10u1
stretch (stable): 4.9.168-1+deb9u4
jessie (oldstable): 3.16.68-2

Debian GNU/Linux device driver check & report

Acer: Travelmate 2451WLCi

PCI IDWorks?VendorDeviceDriverKernel
10025a3fATI Technologies IncRS480 PCI Bridge
10024374ATI Technologies IncIXP SB400 USB Host Controller
10024375ATI Technologies IncIXP SB400 USB Host Controller
10024373ATI Technologies IncIXP SB400 USB2 Host Controller
10024372YesATI Technologies IncIXP SB400 SMBus Controlleri2c-piix4v2.6.25-
10024376YesATI Technologies IncIXP SB400 IDE Controllerpata_atiixpv2.6.25-
1002437bYesATI Technologies IncIXP SB4x0 High Definition Audio Controllersnd-hda-intelv2.6.25-
10024377ATI Technologies IncIXP SB400 PCI-ISA Bridge
10024371ATI Technologies IncIXP SB400 PCI-PCI Bridge
10025a62YesATI Technologies IncRC410 [Radeon Xpress 200M]radeonfbv2.6.25-
168c001aYesAtheros Communications Inc.AR2413 802.11bg NICath5kv2.6.25-
15241410YesENE Technology IncCB1410 Cardbus Controlleryenta_socketv2.6.25-
10ec8139YesRealtek Semiconductor Co., Ltd.RTL-8139/8139C/8139C+8139cp,8139toov2.6.25-

my wireless works fine with madwifi at ubuntu gutsy alpha tribe 5
root@instavel-laptop:/home/myloginz# modinfo ath_pci
filename:       /lib/modules/2.6.22-12-generic/madwifi/ath_pci.ko
license:        Dual BSD/GPL
description:    Support for Atheros 802.11 wireless LAN cards.
author:         Errno Consulting, Sam Leffler
srcversion:     F1ED01FDEFF40A3C458CC49
alias:          pci:v0000168Cd00009013sv*sd*bc*sc*i*
alias:          pci:v0000168Cd0000001Dsv*sd*bc*sc*i*
alias:          pci:v0000168Cd0000001Csv*sd*bc*sc*i*
alias:          pci:v0000168Cd0000001Bsv*sd*bc*sc*i*
alias:          pci:v0000168Cd0000001Asv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000019sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000018sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000017sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000016sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000015sv*sd*bc*sc*i*
alias:          pci:v0000168Cd0000101Asv*sd*bc*sc*i*
alias:          pci:v0000168Cd00001014sv*sd*bc*sc*i*
alias:          pci:v000010B7d00000013sv*sd*bc*sc*i*
alias:          pci:v0000A727d00000013sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000013sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000012sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000007sv*sd*bc*sc*i*
depends:        ath_hal,wlan
vermagic:       2.6.22-12-generic SMP mod_unload 586
parm:           countrycode:Override default country code (int)
parm:           outdoor:Enable/disable outdoor use (int)
parm:           xchanmode:Enable/disable extended channel mode (int)
parm:           rfkill:Enable/disable RFKILL capability (int)
parm:           autocreate:Create ath device in [sta|ap|wds|adhoc|ahdemo|monitor] mode. defaults to sta, use 'none' to disable (charp)
parm:           ratectl:Rate control algorithm [amrr|onoe|sample], defaults to 'sample' (charp)
parm:           ath_debug:Load-time debug output enable (int)
root@instavel-laptop:/home/myloginz# uname -a
Linux instavel-laptop 2.6.22-12-generic #1 SMP Sat Sep 22 18:14:28 GMT 2007 i686 GNU/Linux

dmesg output  modprobe ath_pci
[ 4358.336000] ath_pci: (
[ 4358.336000] ACPI: PCI Interrupt 0000:09:02.0[A] -> GSI 21 (level, low) -> IRQ 20
[ 4359.060000] wifi0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
[ 4359.060000] wifi0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
[ 4359.060000] wifi0: H/W encryption support: WEP AES AES_CCM TKIP
[ 4359.060000] wifi0: mac 7.8 phy 4.5 radio 5.6
[ 4359.060000] wifi0: Use hw queue 1 for WME_AC_BE traffic
[ 4359.060000] wifi0: Use hw queue 0 for WME_AC_BK traffic
[ 4359.060000] wifi0: Use hw queue 2 for WME_AC_VI traffic
[ 4359.060000] wifi0: Use hw queue 3 for WME_AC_VO traffic
[ 4359.060000] wifi0: Use hw queue 8 for CAB traffic
[ 4359.060000] wifi0: Use hw queue 9 for beacons
[ 4359.060000] wifi0: Atheros 5212: mem=0xd0100000, irq=20
[ 4360.144000] ADDRCONF(NETDEV_CHANGE): ath0: link becomes ready